Pollet N et al. (2005), An atlas of differential gene expression during...

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Mech Dev 2005 Mar 01;1223:365-439. doi: 10.1016/j.mod.2004.11.009.

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An atlas of differential gene expression during early Xenopus embryogenesis.

Pollet N , Muncke N , Verbeek B , Li Y , Fenger U , Delius H , Niehrs C .

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We have carried out a large-scale, semi-automated whole-mount in situ hybridization screen of 8369 cDNA clones in Xenopus laevis embryos. We confirm that differential gene expression is prevalent during embryogenesis since 24% of the clones are expressed non-ubiquitously and 8% are organ or cell type specific marker genes. Sequence analysis and clustering yielded 723 unique genes displaying a differential expression pattern. Of these, 18% were already described in Xenopus, 47% have homologs and 35% are lacking significant sequence similarity in databases. Many of them encode known developmental regulators. We classified 363 of the 723 genes for which a Gene Ontology annotation for molecular function could be attributed and found 'DNA binding' and 'enzyme' the most represented terms. The most common protein domains encoded in these embryonic, differentially expressed genes are the homeobox and RNA Recognition Motif (RRM). Fifty-nine putative orthologs of human disease genes, and 254 organ or cell specific marker genes were identified. Markers were found for nasal placode and archenteron roof, organs for which a specific marker was previously unavailable. Markers were also found for novel subdomains of various other organs. The tissues for which most markers were found are muscle and epidermis. Expression of cell cycle regulators fell in two classes, containing proliferation-promoting and anti-proliferative genes, respectively. We identified 66 new members of the BMP4, chromatin, endoplasmic reticulum, and karyopherin synexpression groups, thus providing a first glimpse of their probable cellular roles. Cluster analysis of tissues to measure tissue relatedness yielded some unorthodox affinities besides expectable lineage relationships. In conclusion, this study represents an atlas of gene expression patterns, which reveals embryonic regionalization, provides novel marker genes, and makes predictions about the functional role of unknown genes.

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Species referenced: Xenopus laevis
Genes referenced: abr acsl1 ahnak akap13 aldh16a1 angpt4.2 apob arpp19 astl2e.2 atp2a1 basp1 bin1 bmp4 c5 c5.2 c8h19orf47 capn8.1 carhsp1 carns1 cbfa2t3 ckmt1b copg1 cpeb4 ddx21 dhcr7 dlst dnajc30 efnb1 efr3a elk3 elovl7 eno1 epn2 epn3 esrp1 f2 fen1 ferry3 fndc3a foxc2 ftmt fxr1 gata4 gjb2 glud1 gnao1 gnb3 gsto1 gstp1 hap1 has-rs has1 hmgcs1 hspb1 itm2a lgals3 mespa myh4 myh8 myl11 myod1 nedd9 net1 nt5c2 otud6b p4hb pacsin3 pde3a perp pfkp pi4k2a plekhg4 ppib ppif ppp1r3c ppp1r3c.2 prkd1 prkg1 rab5b rbfox2 rbm12b.5 rbm24 rhoc rreb1 rsph6a samd4b sash3 sat1 sdha sgk1 slc16a3 slc25a1 smarcc1 sox17a spam1 speg spmip8 sra1 srl stxbp6 synm tbl1x tent2 thbs4 tpbg tpm3 trim29 tuba1cl.3 tubb4b upk3a vgll4l wbp11 XB22062450 XB22062458 XB22063322 XB22064002 XB22164556 zdhhc9

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	Fig. 1. Overview of expression, redundancy and DNA sequence data. (A) Classification of clones according to gene expression pattern, values are given in percentage of total number of clones screened by WISH; (B) classification of genes according to redundancy, the number of clones identified per gene (X axis) is plotted versus the number of genes in each abundance class (Y axis); (C) classification of genes according to sequence similarities, values are given as percentages of the number of unique, differentially expressed genes (NZ723), FL, Full-Length Open Reading Frame.
	Fig. 2. Whole mount in situ hybridisations and sequence annotation of ubiquitous gene examples. The left-most part represents the result of sequence similarity searches from cDNA sequences representing these genes: gene symbol, gene name or description of the best hit. The molecular function of the gene product is indicated by a single GO term. The right-most part shows in situ hybridisation results for stage 10C, 13, 30 and 4 days embryos. The absence of pictures showing early stages results does not necessarily imply an absence of expression, and can be ubiquitous or exceptionally not documented. The reader can find more pictures showing additional views and results from distinct experiments in Axeldb database, and a description of the expression pattern using a controlled vocabulary. Xl, known Xenopus gene; F, Full-Length Open Reading Frame; A, alternative transcript; p, protein similarity; n, nucleotidic similarity; HS, high similarity; MS, medium similarity; WS, weak similarity.
	Fig. 3. Classification of genes according to Gene Ontology molecular function controlled vocabulary. A histogram showing the number of GO terms represented by the 723 genes identified is shown. Indentation of terms indicates their hierarchy. Non-marker (black) and marker gene (grey) numbers for each term are indicated.
	Fig. 4. Top 30 protein domains. Histogram showing the number of genes encoding the 30 most abundant PFAM protein domains in the 723 genes identified.
	Fig. 5. Frequency of transcription factor classes. Values are given in percentage of the total number of genes encoding transcription factors (NZ50). The class names are according to the InterPro database (http://www.ebi.ac.uk/interpro/).
	Fig. 6. Tissue distribution of marker genes. Number of marker genes for each tissue, sorted by germ layers: mesoderm in red, non-neural ectoderm in pale blue, neurectoderm in dark blue, endoderm in green. Inset: proportion of markers in the 723 genes.
	Fig. 7. (7.1) Marker genes. Whole mount in situ hybridisations of stage 10C, 13, 30 or 4 day embryos are shown. Gene symbol, sequence similarities with gene name or description of the best hit, and GO molecular function classification are indicated. Gene order is alphabetical. The absence of pictures showing early stages results does not necessarily imply an absence of expression, and can be ubiquitous or exceptionally not documented. The reader can find more pictures showing additional views and results from distinct experiments in Axeldb database, and a description of the expression pattern using a controlled vocabulary. Figure panels are presented by gene expression categories in single and double column layering. The expression patterns are sorted alphabetically and numerically, and layed out in single or double columns. An asterisk indicates the categories splitted over several page. Xl, known Xenopus gene; F, Full-Length Open Reading Frame; A, alternative transcript; p, protein similarity; n, nucleotidic similarity; HS, high similarity; MS, medium similarity; WS, weak similarity.
	Fig. 7. (7.2) Marker genes. Whole mount in situ hybridisations of stage 10C, 13, 30 or 4 day embryos are shown. Gene symbol, sequence similarities with gene name or description of the best hit, and GO molecular function classification are indicated. Gene order is alphabetical. The absence of pictures showing early stages results does not necessarily imply an absence of expression, and can be ubiquitous or exceptionally not documented. The reader can find more pictures showing additional views and results from distinct experiments in Axeldb database, and a description of the expression pattern using a controlled vocabulary. Figure panels are presented by gene expression categories in single and double column layering. The expression patterns are sorted alphabetically and numerically, and layed out in single or double columns. An asterisk indicates the categories splitted over several page. Xl, known Xenopus gene; F, Full-Length Open Reading Frame; A, alternative transcript; p, protein similarity; n, nucleotidic similarity; HS, high similarity; MS, medium similarity; WS, weak similarity.
	Fig. 7. (7.3) Marker genes. Whole mount in situ hybridisations of stage 10C, 13, 30 or 4 day embryos are shown. Gene symbol, sequence similarities with gene name or description of the best hit, and GO molecular function classification are indicated. Gene order is alphabetical. The absence of pictures showing early stages results does not necessarily imply an absence of expression, and can be ubiquitous or exceptionally not documented. The reader can find more pictures showing additional views and results from distinct experiments in Axeldb database, and a description of the expression pattern using a controlled vocabulary. Figure panels are presented by gene expression categories in single and double column layering. The expression patterns are sorted alphabetically and numerically, and layed out in single or double columns. An asterisk indicates the categories splitted over several page. Xl, known Xenopus gene; F, Full-Length Open Reading Frame; A, alternative transcript; p, protein similarity; n, nucleotidic similarity; HS, high similarity; MS, medium similarity; WS, weak similarity.
	Fig. 7. (7.4) Marker genes. Whole mount in situ hybridisations of stage 10C, 13, 30 or 4 day embryos are shown. Gene symbol, sequence similarities with gene name or description of the best hit, and GO molecular function classification are indicated. Gene order is alphabetical. The absence of pictures showing early stages results does not necessarily imply an absence of expression, and can be ubiquitous or exceptionally not documented. The reader can find more pictures showing additional views and results from distinct experiments in Axeldb database, and a description of the expression pattern using a controlled vocabulary. Figure panels are presented by gene expression categories in single and double column layering. The expression patterns are sorted alphabetically and numerically, and layed out in single or double columns. An asterisk indicates the categories splitted over several page. Xl, known Xenopus gene; F, Full-Length Open Reading Frame; A, alternative transcript; p, protein similarity; n, nucleotidic similarity; HS, high similarity; MS, medium similarity; WS, weak similarity.
	Fig. 7. (7.5) Marker genes. Whole mount in situ hybridisations of stage 10C, 13, 30 or 4 day embryos are shown. Gene symbol, sequence similarities with gene name or description of the best hit, and GO molecular function classification are indicated. Gene order is alphabetical. The absence of pictures showing early stages results does not necessarily imply an absence of expression, and can be ubiquitous or exceptionally not documented. The reader can find more pictures showing additional views and results from distinct experiments in Axeldb database, and a description of the expression pattern using a controlled vocabulary. Figure panels are presented by gene expression categories in single and double column layering. The expression patterns are sorted alphabetically and numerically, and layed out in single or double columns. An asterisk indicates the categories splitted over several page. Xl, known Xenopus gene; F, Full-Length Open Reading Frame; A, alternative transcript; p, protein similarity; n, nucleotidic similarity; HS, high similarity; MS, medium similarity; WS, weak similarity.
	Fig. 7. (7.6) Marker genes. Whole mount in situ hybridisations of stage 10C, 13, 30 or 4 day embryos are shown. Gene symbol, sequence similarities with gene name or description of the best hit, and GO molecular function classification are indicated. Gene order is alphabetical. The absence of pictures showing early stages results does not necessarily imply an absence of expression, and can be ubiquitous or exceptionally not documented. The reader can find more pictures showing additional views and results from distinct experiments in Axeldb database, and a description of the expression pattern using a controlled vocabulary. Figure panels are presented by gene expression categories in single and double column layering. The expression patterns are sorted alphabetically and numerically, and layed out in single or double columns. An asterisk indicates the categories splitted over several page. Xl, known Xenopus gene; F, Full-Length Open Reading Frame; A, alternative transcript; p, protein similarity; n, nucleotidic similarity; HS, high similarity; MS, medium similarity; WS, weak similarity.
	Fig. 7. (7.7) Marker genes. Whole mount in situ hybridisations of stage 10C, 13, 30 or 4 day embryos are shown. Gene symbol, sequence similarities with gene name or description of the best hit, and GO molecular function classification are indicated. Gene order is alphabetical. The absence of pictures showing early stages results does not necessarily imply an absence of expression, and can be ubiquitous or exceptionally not documented. The reader can find more pictures showing additional views and results from distinct experiments in Axeldb database, and a description of the expression pattern using a controlled vocabulary. Figure panels are presented by gene expression categories in single and double column layering. The expression patterns are sorted alphabetically and numerically, and layed out in single or double columns. An asterisk indicates the categories splitted over several page. Xl, known Xenopus gene; F, Full-Length Open Reading Frame; A, alternative transcript; p, protein similarity; n, nucleotidic similarity; HS, high similarity; MS, medium similarity; WS, weak similarity. mf1 myod1.S somi03 can't find any indication of what this clone is somi06 myh8.L, myh4.L somi12 carns1.L somi14 rreb1.L somi16 srl.L somi18 atp2a1.S somi23 mylpf.L , mylpf.S should be S only somi28 thbs4.S somi31 c19orf47.L
	Fig. 7. (7.8) Marker genes. Whole mount in situ hybridisations of stage 10C, 13, 30 or 4 day embryos are shown. Gene symbol, sequence similarities with gene name or description of the best hit, and GO molecular function classification are indicated. Gene order is alphabetical. The absence of pictures showing early stages results does not necessarily imply an absence of expression, and can be ubiquitous or exceptionally not documented. The reader can find more pictures showing additional views and results from distinct experiments in Axeldb database, and a description of the expression pattern using a controlled vocabulary. Figure panels are presented by gene expression categories in single and double column layering. The expression patterns are sorted alphabetically and numerically, and layed out in single or double columns. An asterisk indicates the categories splitted over several page. Xl, known Xenopus gene; F, Full-Length Open Reading Frame; A, alternative transcript; p, protein similarity; n, nucleotidic similarity; HS, high similarity; MS, medium similarity; WS, weak similarity.
	Fig. 7. (7.9) Marker genes. Whole mount in situ hybridisations of stage 10C, 13, 30 or 4 day embryos are shown. Gene symbol, sequence similarities with gene name or description of the best hit, and GO molecular function classification are indicated. Gene order is alphabetical. The absence of pictures showing early stages results does not necessarily imply an absence of expression, and can be ubiquitous or exceptionally not documented. The reader can find more pictures showing additional views and results from distinct experiments in Axeldb database, and a description of the expression pattern using a controlled vocabulary. Figure panels are presented by gene expression categories in single and double column layering. The expression patterns are sorted alphabetically and numerically, and layed out in single or double columns. An asterisk indicates the categories splitted over several page. Xl, known Xenopus gene; F, Full-Length Open Reading Frame; A, alternative transcript; p, protein similarity; n, nucleotidic similarity; HS, high similarity; MS, medium similarity; WS, weak similarity.
	Fig. 7. (7.10) Marker genes. Whole mount in situ hybridisations of stage 10C, 13, 30 or 4 day embryos are shown. Gene symbol, sequence similarities with gene name or description of the best hit, and GO molecular function classification are indicated. Gene order is alphabetical. The absence of pictures showing early stages results does not necessarily imply an absence of expression, and can be ubiquitous or exceptionally not documented. The reader can find more pictures showing additional views and results from distinct experiments in Axeldb database, and a description of the expression pattern using a controlled vocabulary. Figure panels are presented by gene expression categories in single and double column layering. The expression patterns are sorted alphabetically and numerically, and layed out in single or double columns. An asterisk indicates the categories splitted over several page. Xl, known Xenopus gene; F, Full-Length Open Reading Frame; A, alternative transcript; p, protein similarity; n, nucleotidic similarity; HS, high similarity; MS, medium similarity; WS, weak similarity.
	Fig. 7. (7.11) Marker genes. Whole mount in situ hybridisations of stage 10C, 13, 30 or 4 day embryos are shown. Gene symbol, sequence similarities with gene name or description of the best hit, and GO molecular function classification are indicated. Gene order is alphabetical. The absence of pictures showing early stages results does not necessarily imply an absence of expression, and can be ubiquitous or exceptionally not documented. The reader can find more pictures showing additional views and results from distinct experiments in Axeldb database, and a description of the expression pattern using a controlled vocabulary. Figure panels are presented by gene expression categories in single and double column layering. The expression patterns are sorted alphabetically and numerically, and layed out in single or double columns. An asterisk indicates the categories splitted over several page. Xl, known Xenopus gene; F, Full-Length Open Reading Frame; A, alternative transcript; p, protein similarity; n, nucleotidic similarity; HS, high similarity; MS, medium similarity; WS, weak similarity.
	Fig. 7. (7.12) Marker genes. Whole mount in situ hybridisations of stage 10C, 13, 30 or 4 day embryos are shown. Gene symbol, sequence similarities with gene name or description of the best hit, and GO molecular function classification are indicated. Gene order is alphabetical. The absence of pictures showing early stages results does not necessarily imply an absence of expression, and can be ubiquitous or exceptionally not documented. The reader can find more pictures showing additional views and results from distinct experiments in Axeldb database, and a description of the expression pattern using a controlled vocabulary. Figure panels are presented by gene expression categories in single and double column layering. The expression patterns are sorted alphabetically and numerically, and layed out in single or double columns. An asterisk indicates the categories splitted over several page. Xl, known Xenopus gene; F, Full-Length Open Reading Frame; A, alternative transcript; p, protein similarity; n, nucleotidic similarity; HS, high similarity; MS, medium similarity; WS, weak similarity.
	Fig. 7. (7.13) Marker genes. Whole mount in situ hybridisations of stage 10C, 13, 30 or 4 day embryos are shown. Gene symbol, sequence similarities with gene name or description of the best hit, and GO molecular function classification are indicated. Gene order is alphabetical. The absence of pictures showing early stages results does not necessarily imply an absence of expression, and can be ubiquitous or exceptionally not documented. The reader can find more pictures showing additional views and results from distinct experiments in Axeldb database, and a description of the expression pattern using a controlled vocabulary. Figure panels are presented by gene expression categories in single and double column layering. The expression patterns are sorted alphabetically and numerically, and layed out in single or double columns. An asterisk indicates the categories splitted over several page. Xl, known Xenopus gene; F, Full-Length Open Reading Frame; A, alternative transcript; p, protein similarity; n, nucleotidic similarity; HS, high similarity; MS, medium similarity; WS, weak similarity.
	Fig. 7. (7.14) Marker genes. Whole mount in situ hybridisations of stage 10C, 13, 30 or 4 day embryos are shown. Gene symbol, sequence similarities with gene name or description of the best hit, and GO molecular function classification are indicated. Gene order is alphabetical. The absence of pictures showing early stages results does not necessarily imply an absence of expression, and can be ubiquitous or exceptionally not documented. The reader can find more pictures showing additional views and results from distinct experiments in Axeldb database, and a description of the expression pattern using a controlled vocabulary. Figure panels are presented by gene expression categories in single and double column layering. The expression patterns are sorted alphabetically and numerically, and layed out in single or double columns. An asterisk indicates the categories splitted over several page. Xl, known Xenopus gene; F, Full-Length Open Reading Frame; A, alternative transcript; p, protein similarity; n, nucleotidic similarity; HS, high similarity; MS, medium similarity; WS, weak similarity.
	Fig. 7. (7.15) Marker genes. Whole mount in situ hybridisations of stage 10C, 13, 30 or 4 day embryos are shown. Gene symbol, sequence similarities with gene name or description of the best hit, and GO molecular function classification are indicated. Gene order is alphabetical. The absence of pictures showing early stages results does not necessarily imply an absence of expression, and can be ubiquitous or exceptionally not documented. The reader can find more pictures showing additional views and results from distinct experiments in Axeldb database, and a description of the expression pattern using a controlled vocabulary. Figure panels are presented by gene expression categories in single and double column layering. The expression patterns are sorted alphabetically and numerically, and layed out in single or double columns. An asterisk indicates the categories splitted over several page. Xl, known Xenopus gene; F, Full-Length Open Reading Frame; A, alternative transcript; p, protein similarity; n, nucleotidic similarity; HS, high similarity; MS, medium similarity; WS, weak similarity.
	Fig. 7. (7.16) Marker genes. Whole mount in situ hybridisations of stage 10C, 13, 30 or 4 day embryos are shown. Gene symbol, sequence similarities with gene name or description of the best hit, and GO molecular function classification are indicated. Gene order is alphabetical. The absence of pictures showing early stages results does not necessarily imply an absence of expression, and can be ubiquitous or exceptionally not documented. The reader can find more pictures showing additional views and results from distinct experiments in Axeldb database, and a description of the expression pattern using a controlled vocabulary. Figure panels are presented by gene expression categories in single and double column layering. The expression patterns are sorted alphabetically and numerically, and layed out in single or double columns. An asterisk indicates the categories splitted over several page. Xl, known Xenopus gene; F, Full-Length Open Reading Frame; A, alternative transcript; p, protein similarity; n, nucleotidic similarity; HS, high similarity; MS, medium similarity; WS, weak similarity.
	Fig. 7. (7.17) Marker genes. Whole mount in situ hybridisations of stage 10C, 13, 30 or 4 day embryos are shown. Gene symbol, sequence similarities with gene name or description of the best hit, and GO molecular function classification are indicated. Gene order is alphabetical. The absence of pictures showing early stages results does not necessarily imply an absence of expression, and can be ubiquitous or exceptionally not documented. The reader can find more pictures showing additional views and results from distinct experiments in Axeldb database, and a description of the expression pattern using a controlled vocabulary. Figure panels are presented by gene expression categories in single and double column layering. The expression patterns are sorted alphabetically and numerically, and layed out in single or double columns. An asterisk indicates the categories splitted over several page. Xl, known Xenopus gene; F, Full-Length Open Reading Frame; A, alternative transcript; p, protein similarity; n, nucleotidic similarity; HS, high similarity; MS, medium similarity; WS, weak similarity.
	Fig. 7. (7.18) Marker genes. Whole mount in situ hybridisations of stage 10C, 13, 30 or 4 day embryos are shown. Gene symbol, sequence similarities with gene name or description of the best hit, and GO molecular function classification are indicated. Gene order is alphabetical. The absence of pictures showing early stages results does not necessarily imply an absence of expression, and can be ubiquitous or exceptionally not documented. The reader can find more pictures showing additional views and results from distinct experiments in Axeldb database, and a description of the expression pattern using a controlled vocabulary. Figure panels are presented by gene expression categories in single and double column layering. The expression patterns are sorted alphabetically and numerically, and layed out in single or double columns. An asterisk indicates the categories splitted over several page. Xl, known Xenopus gene; F, Full-Length Open Reading Frame; A, alternative transcript; p, protein similarity; n, nucleotidic similarity; HS, high similarity; MS, medium similarity; WS, weak similarity.
	Fig. 7. (7.19) Marker genes. Whole mount in situ hybridisations of stage 10C, 13, 30 or 4 day embryos are shown. Gene symbol, sequence similarities with gene name or description of the best hit, and GO molecular function classification are indicated. Gene order is alphabetical. The absence of pictures showing early stages results does not necessarily imply an absence of expression, and can be ubiquitous or exceptionally not documented. The reader can find more pictures showing additional views and results from distinct experiments in Axeldb database, and a description of the expression pattern using a controlled vocabulary. Figure panels are presented by gene expression categories in single and double column layering. The expression patterns are sorted alphabetically and numerically, and layed out in single or double columns. An asterisk indicates the categories splitted over several page. Xl, known Xenopus gene; F, Full-Length Open Reading Frame; A, alternative transcript; p, protein similarity; n, nucleotidic similarity; HS, high similarity; MS, medium similarity; WS, weak similarity.
	The cnsy05 probe matches the overlapping 3' utr of the adjoining genes of sash3 and zdhhc9 Fig. 7. (7.20) Marker genes. Whole mount in situ hybridisations of stage 10C, 13, 30 or 4 day embryos are shown. Gene symbol, sequence similarities with gene name or description of the best hit, and GO molecular function classification are indicated. Gene order is alphabetical. The absence of pictures showing early stages results does not necessarily imply an absence of expression, and can be ubiquitous or exceptionally not documented. The reader can find more pictures showing additional views and results from distinct experiments in Axeldb database, and a description of the expression pattern using a controlled vocabulary. Figure panels are presented by gene expression categories in single and double column layering. The expression patterns are sorted alphabetically and numerically, and layed out in single or double columns. An asterisk indicates the categories splitted over several page. Xl, known Xenopus gene; F, Full-Length Open Reading Frame; A, alternative transcript; p, protein similarity; n, nucleotidic similarity; HS, high similarity; MS, medium similarity; WS, weak similarity.
	Fig. 7. (7.21) Marker genes. Whole mount in situ hybridisations of stage 10C, 13, 30 or 4 day embryos are shown. Gene symbol, sequence similarities with gene name or description of the best hit, and GO molecular function classification are indicated. Gene order is alphabetical. The absence of pictures showing early stages results does not necessarily imply an absence of expression, and can be ubiquitous or exceptionally not documented. The reader can find more pictures showing additional views and results from distinct experiments in Axeldb database, and a description of the expression pattern using a controlled vocabulary. Figure panels are presented by gene expression categories in single and double column layering. The expression patterns are sorted alphabetically and numerically, and layed out in single or double columns. An asterisk indicates the categories splitted over several page. Xl, known Xenopus gene; F, Full-Length Open Reading Frame; A, alternative transcript; p, protein similarity; n, nucleotidic similarity; HS, high similarity; MS, medium similarity; WS, weak similarity.
	Fig. 7. (7.22) Marker genes. Whole mount in situ hybridisations of stage 10C, 13, 30 or 4 day embryos are shown. Gene symbol, sequence similarities with gene name or description of the best hit, and GO molecular function classification are indicated. Gene order is alphabetical. The absence of pictures showing early stages results does not necessarily imply an absence of expression, and can be ubiquitous or exceptionally not documented. The reader can find more pictures showing additional views and results from distinct experiments in Axeldb database, and a description of the expression pattern using a controlled vocabulary. Figure panels are presented by gene expression categories in single and double column layering. The expression patterns are sorted alphabetically and numerically, and layed out in single or double columns. An asterisk indicates the categories splitted over several page. Xl, known Xenopus gene; F, Full-Length Open Reading Frame; A, alternative transcript; p, protein similarity; n, nucleotidic similarity; HS, high similarity; MS, medium similarity; WS, weak similarity.
	Fig. 8. (8.1) Marker genes. Whole mount in situ hybridisations of stage 10C, 13, 30 or 4 day embryos are shown. Gene symbol, sequence similarities with gene name or description of the best hit, and GO molecular function classification are indicated. Gene order is alphabetical. The absence of pictures showing early stages results does not necessarily imply an absence of expression, and can be ubiquitous or exceptionally not documented. The reader can find more pictures showing additional views and results from distinct experiments in Axeldb database, and a description of the expression pattern using a controlled vocabulary. Figure panels are presented by gene expression categories in single and double column layering. The expression patterns are sorted alphabetically and numerically, and layed out in single or double columns. An asterisk indicates the categories splitted over several page. Xl, known Xenopus gene; F, Full-Length Open Reading Frame; A, alternative transcript; p, protein similarity; n, nucleotidic similarity; HS, high similarity; MS, medium similarity; WS, weak similarity.
	Fig. 8. (8.2) Marker genes. Whole mount in situ hybridisations of stage 10C, 13, 30 or 4 day embryos are shown. Gene symbol, sequence similarities with gene name or description of the best hit, and GO molecular function classification are indicated. Gene order is alphabetical. The absence of pictures showing early stages results does not necessarily imply an absence of expression, and can be ubiquitous or exceptionally not documented. The reader can find more pictures showing additional views and results from distinct experiments in Axeldb database, and a description of the expression pattern using a controlled vocabulary. Figure panels are presented by gene expression categories in single and double column layering. The expression patterns are sorted alphabetically and numerically, and layed out in single or double columns. An asterisk indicates the categories splitted over several page. Xl, known Xenopus gene; F, Full-Length Open Reading Frame; A, alternative transcript; p, protein similarity; n, nucleotidic similarity; HS, high similarity; MS, medium similarity; WS, weak similarity.
	Fig. 8. (8.3) Marker genes. Whole mount in situ hybridisations of stage 10C, 13, 30 or 4 day embryos are shown. Gene symbol, sequence similarities with gene name or description of the best hit, and GO molecular function classification are indicated. Gene order is alphabetical. The absence of pictures showing early stages results does not necessarily imply an absence of expression, and can be ubiquitous or exceptionally not documented. The reader can find more pictures showing additional views and results from distinct experiments in Axeldb database, and a description of the expression pattern using a controlled vocabulary. Figure panels are presented by gene expression categories in single and double column layering. The expression patterns are sorted alphabetically and numerically, and layed out in single or double columns. An asterisk indicates the categories splitted over several page. Xl, known Xenopus gene; F, Full-Length Open Reading Frame; A, alternative transcript; p, protein similarity; n, nucleotidic similarity; HS, high similarity; MS, medium similarity; WS, weak similarity.
	Fig. 8. (8.4) Marker genes. Whole mount in situ hybridisations of stage 10C, 13, 30 or 4 day embryos are shown. Gene symbol, sequence similarities with gene name or description of the best hit, and GO molecular function classification are indicated. Gene order is alphabetical. The absence of pictures showing early stages results does not necessarily imply an absence of expression, and can be ubiquitous or exceptionally not documented. The reader can find more pictures showing additional views and results from distinct experiments in Axeldb database, and a description of the expression pattern using a controlled vocabulary. Figure panels are presented by gene expression categories in single and double column layering. The expression patterns are sorted alphabetically and numerically, and layed out in single or double columns. An asterisk indicates the categories splitted over several page. Xl, known Xenopus gene; F, Full-Length Open Reading Frame; A, alternative transcript; p, protein similarity; n, nucleotidic similarity; HS, high similarity; MS, medium similarity; WS, weak similarity.
	Fig. 8. (8.5) Marker genes. Whole mount in situ hybridisations of stage 10C, 13, 30 or 4 day embryos are shown. Gene symbol, sequence similarities with gene name or description of the best hit, and GO molecular function classification are indicated. Gene order is alphabetical. The absence of pictures showing early stages results does not necessarily imply an absence of expression, and can be ubiquitous or exceptionally not documented. The reader can find more pictures showing additional views and results from distinct experiments in Axeldb database, and a description of the expression pattern using a controlled vocabulary. Figure panels are presented by gene expression categories in single and double column layering. The expression patterns are sorted alphabetically and numerically, and layed out in single or double columns. An asterisk indicates the categories splitted over several page. Xl, known Xenopus gene; F, Full-Length Open Reading Frame; A, alternative transcript; p, protein similarity; n, nucleotidic similarity; HS, high similarity; MS, medium similarity; WS, weak similarity.
	Fig. 8. (8.6) Marker genes. Whole mount in situ hybridisations of stage 10C, 13, 30 or 4 day embryos are shown. Gene symbol, sequence similarities with gene name or description of the best hit, and GO molecular function classification are indicated. Gene order is alphabetical. The absence of pictures showing early stages results does not necessarily imply an absence of expression, and can be ubiquitous or exceptionally not documented. The reader can find more pictures showing additional views and results from distinct experiments in Axeldb database, and a description of the expression pattern using a controlled vocabulary. Figure panels are presented by gene expression categories in single and double column layering. The expression patterns are sorted alphabetically and numerically, and layed out in single or double columns. An asterisk indicates the categories splitted over several page. Xl, known Xenopus gene; F, Full-Length Open Reading Frame; A, alternative transcript; p, protein similarity; n, nucleotidic similarity; HS, high similarity; MS, medium similarity; WS, weak similarity.
	Fig. 8. (8.7) Marker genes. Whole mount in situ hybridisations of stage 10C, 13, 30 or 4 day embryos are shown. Gene symbol, sequence similarities with gene name or description of the best hit, and GO molecular function classification are indicated. Gene order is alphabetical. The absence of pictures showing early stages results does not necessarily imply an absence of expression, and can be ubiquitous or exceptionally not documented. The reader can find more pictures showing additional views and results from distinct experiments in Axeldb database, and a description of the expression pattern using a controlled vocabulary. Figure panels are presented by gene expression categories in single and double column layering. The expression patterns are sorted alphabetically and numerically, and layed out in single or double columns. An asterisk indicates the categories splitted over several page. Xl, known Xenopus gene; F, Full-Length Open Reading Frame; A, alternative transcript; p, protein similarity; n, nucleotidic similarity; HS, high similarity; MS, medium similarity; WS, weak similarity.
	Fig. 8. (8.8) Marker genes. Whole mount in situ hybridisations of stage 10C, 13, 30 or 4 day embryos are shown. Gene symbol, sequence similarities with gene name or description of the best hit, and GO molecular function classification are indicated. Gene order is alphabetical. The absence of pictures showing early stages results does not necessarily imply an absence of expression, and can be ubiquitous or exceptionally not documented. The reader can find more pictures showing additional views and results from distinct experiments in Axeldb database, and a description of the expression pattern using a controlled vocabulary. Figure panels are presented by gene expression categories in single and double column layering. The expression patterns are sorted alphabetically and numerically, and layed out in single or double columns. An asterisk indicates the categories splitted over several page. Xl, known Xenopus gene; F, Full-Length Open Reading Frame; A, alternative transcript; p, protein similarity; n, nucleotidic similarity; HS, high similarity; MS, medium similarity; WS, weak similarity.
	Fig. 8. (8.9) Marker genes. Whole mount in situ hybridisations of stage 10C, 13, 30 or 4 day embryos are shown. Gene symbol, sequence similarities with gene name or description of the best hit, and GO molecular function classification are indicated. Gene order is alphabetical. The absence of pictures showing early stages results does not necessarily imply an absence of expression, and can be ubiquitous or exceptionally not documented. The reader can find more pictures showing additional views and results from distinct experiments in Axeldb database, and a description of the expression pattern using a controlled vocabulary. Figure panels are presented by gene expression categories in single and double column layering. The expression patterns are sorted alphabetically and numerically, and layed out in single or double columns. An asterisk indicates the categories splitted over several page. Xl, known Xenopus gene; F, Full-Length Open Reading Frame; A, alternative transcript; p, protein similarity; n, nucleotidic similarity; HS, high similarity; MS, medium similarity; WS, weak similarity.
	Fig. 8. (8.10) Marker genes. Whole mount in situ hybridisations of stage 10C, 13, 30 or 4 day embryos are shown. Gene symbol, sequence similarities with gene name or description of the best hit, and GO molecular function classification are indicated. Gene order is alphabetical. The absence of pictures showing early stages results does not necessarily imply an absence of expression, and can be ubiquitous or exceptionally not documented. The reader can find more pictures showing additional views and results from distinct experiments in Axeldb database, and a description of the expression pattern using a controlled vocabulary. Figure panels are presented by gene expression categories in single and double column layering. The expression patterns are sorted alphabetically and numerically, and layed out in single or double columns. An asterisk indicates the categories splitted over several page. Xl, known Xenopus gene; F, Full-Length Open Reading Frame; A, alternative transcript; p, protein similarity; n, nucleotidic similarity; HS, high similarity; MS, medium similarity; WS, weak similarity.
	Fig. 8. (8.11) Marker genes. Whole mount in situ hybridisations of stage 10C, 13, 30 or 4 day embryos are shown. Gene symbol, sequence similarities with gene name or description of the best hit, and GO molecular function classification are indicated. Gene order is alphabetical. The absence of pictures showing early stages results does not necessarily imply an absence of expression, and can be ubiquitous or exceptionally not documented. The reader can find more pictures showing additional views and results from distinct experiments in Axeldb database, and a description of the expression pattern using a controlled vocabulary. Figure panels are presented by gene expression categories in single and double column layering. The expression patterns are sorted alphabetically and numerically, and layed out in single or double columns. An asterisk indicates the categories splitted over several page. Xl, known Xenopus gene; F, Full-Length Open Reading Frame; A, alternative transcript; p, protein similarity; n, nucleotidic similarity; HS, high similarity; MS, medium similarity; WS, weak similarity.
	Fig. 8. (8.12) Marker genes. Whole mount in situ hybridisations of stage 10C, 13, 30 or 4 day embryos are shown. Gene symbol, sequence similarities with gene name or description of the best hit, and GO molecular function classification are indicated. Gene order is alphabetical. The absence of pictures showing early stages results does not necessarily imply an absence of expression, and can be ubiquitous or exceptionally not documented. The reader can find more pictures showing additional views and results from distinct experiments in Axeldb database, and a description of the expression pattern using a controlled vocabulary. Figure panels are presented by gene expression categories in single and double column layering. The expression patterns are sorted alphabetically and numerically, and layed out in single or double columns. An asterisk indicates the categories splitted over several page. Xl, known Xenopus gene; F, Full-Length Open Reading Frame; A, alternative transcript; p, protein similarity; n, nucleotidic similarity; HS, high similarity; MS, medium similarity; WS, weak similarity.
	Fig. 8. (8.13) Marker genes. Whole mount in situ hybridisations of stage 10C, 13, 30 or 4 day embryos are shown. Gene symbol, sequence similarities with gene name or description of the best hit, and GO molecular function classification are indicated. Gene order is alphabetical. The absence of pictures showing early stages results does not necessarily imply an absence of expression, and can be ubiquitous or exceptionally not documented. The reader can find more pictures showing additional views and results from distinct experiments in Axeldb database, and a description of the expression pattern using a controlled vocabulary. Figure panels are presented by gene expression categories in single and double column layering. The expression patterns are sorted alphabetically and numerically, and layed out in single or double columns. An asterisk indicates the categories splitted over several page. Xl, known Xenopus gene; F, Full-Length Open Reading Frame; A, alternative transcript; p, protein similarity; n, nucleotidic similarity; HS, high similarity; MS, medium similarity; WS, weak similarity.
	Fig. 8. (8.14) Marker genes. Whole mount in situ hybridisations of stage 10C, 13, 30 or 4 day embryos are shown. Gene symbol, sequence similarities with gene name or description of the best hit, and GO molecular function classification are indicated. Gene order is alphabetical. The absence of pictures showing early stages results does not necessarily imply an absence of expression, and can be ubiquitous or exceptionally not documented. The reader can find more pictures showing additional views and results from distinct experiments in Axeldb database, and a description of the expression pattern using a controlled vocabulary. Figure panels are presented by gene expression categories in single and double column layering. The expression patterns are sorted alphabetically and numerically, and layed out in single or double columns. An asterisk indicates the categories splitted over several page. Xl, known Xenopus gene; F, Full-Length Open Reading Frame; A, alternative transcript; p, protein similarity; n, nucleotidic similarity; HS, high similarity; MS, medium similarity; WS, weak similarity.
	Fig. 8. (8.15) Marker genes. Whole mount in situ hybridisations of stage 10C, 13, 30 or 4 day embryos are shown. Gene symbol, sequence similarities with gene name or description of the best hit, and GO molecular function classification are indicated. Gene order is alphabetical. The absence of pictures showing early stages results does not necessarily imply an absence of expression, and can be ubiquitous or exceptionally not documented. The reader can find more pictures showing additional views and results from distinct experiments in Axeldb database, and a description of the expression pattern using a controlled vocabulary. Figure panels are presented by gene expression categories in single and double column layering. The expression patterns are sorted alphabetically and numerically, and layed out in single or double columns. An asterisk indicates the categories splitted over several page. Xl, known Xenopus gene; F, Full-Length Open Reading Frame; A, alternative transcript; p, protein similarity; n, nucleotidic similarity; HS, high similarity; MS, medium similarity; WS, weak similarity.
	Fig. 8. (8.16) Marker genes. Whole mount in situ hybridisations of stage 10C, 13, 30 or 4 day embryos are shown. Gene symbol, sequence similarities with gene name or description of the best hit, and GO molecular function classification are indicated. Gene order is alphabetical. The absence of pictures showing early stages results does not necessarily imply an absence of expression, and can be ubiquitous or exceptionally not documented. The reader can find more pictures showing additional views and results from distinct experiments in Axeldb database, and a description of the expression pattern using a controlled vocabulary. Figure panels are presented by gene expression categories in single and double column layering. The expression patterns are sorted alphabetically and numerically, and layed out in single or double columns. An asterisk indicates the categories splitted over several page. Xl, known Xenopus gene; F, Full-Length Open Reading Frame; A, alternative transcript; p, protein similarity; n, nucleotidic similarity; HS, high similarity; MS, medium similarity; WS, weak similarity.
	Fig. 8. (8.17) Marker genes. Whole mount in situ hybridisations of stage 10C, 13, 30 or 4 day embryos are shown. Gene symbol, sequence similarities with gene name or description of the best hit, and GO molecular function classification are indicated. Gene order is alphabetical. The absence of pictures showing early stages results does not necessarily imply an absence of expression, and can be ubiquitous or exceptionally not documented. The reader can find more pictures showing additional views and results from distinct experiments in Axeldb database, and a description of the expression pattern using a controlled vocabulary. Figure panels are presented by gene expression categories in single and double column layering. The expression patterns are sorted alphabetically and numerically, and layed out in single or double columns. An asterisk indicates the categories splitted over several page. Xl, known Xenopus gene; F, Full-Length Open Reading Frame; A, alternative transcript; p, protein similarity; n, nucleotidic similarity; HS, high similarity; MS, medium similarity; WS, weak similarity.
	Fig. 8. (8.18) Marker genes. Whole mount in situ hybridisations of stage 10C, 13, 30 or 4 day embryos are shown. Gene symbol, sequence similarities with gene name or description of the best hit, and GO molecular function classification are indicated. Gene order is alphabetical. The absence of pictures showing early stages results does not necessarily imply an absence of expression, and can be ubiquitous or exceptionally not documented. The reader can find more pictures showing additional views and results from distinct experiments in Axeldb database, and a description of the expression pattern using a controlled vocabulary. Figure panels are presented by gene expression categories in single and double column layering. The expression patterns are sorted alphabetically and numerically, and layed out in single or double columns. An asterisk indicates the categories splitted over several page. Xl, known Xenopus gene; F, Full-Length Open Reading Frame; A, alternative transcript; p, protein similarity; n, nucleotidic similarity; HS, high similarity; MS, medium similarity; WS, weak similarity.
	Fig. 8. (8.19) Marker genes. Whole mount in situ hybridisations of stage 10C, 13, 30 or 4 day embryos are shown. Gene symbol, sequence similarities with gene name or description of the best hit, and GO molecular function classification are indicated. Gene order is alphabetical. The absence of pictures showing early stages results does not necessarily imply an absence of expression, and can be ubiquitous or exceptionally not documented. The reader can find more pictures showing additional views and results from distinct experiments in Axeldb database, and a description of the expression pattern using a controlled vocabulary. Figure panels are presented by gene expression categories in single and double column layering. The expression patterns are sorted alphabetically and numerically, and layed out in single or double columns. An asterisk indicates the categories splitted over several page. Xl, known Xenopus gene; F, Full-Length Open Reading Frame; A, alternative transcript; p, protein similarity; n, nucleotidic similarity; HS, high similarity; MS, medium similarity; WS, weak similarity.
	Fig. 8. (8.20) Marker genes. Whole mount in situ hybridisations of stage 10C, 13, 30 or 4 day embryos are shown. Gene symbol, sequence similarities with gene name or description of the best hit, and GO molecular function classification are indicated. Gene order is alphabetical. The absence of pictures showing early stages results does not necessarily imply an absence of expression, and can be ubiquitous or exceptionally not documented. The reader can find more pictures showing additional views and results from distinct experiments in Axeldb database, and a description of the expression pattern using a controlled vocabulary. Figure panels are presented by gene expression categories in single and double column layering. The expression patterns are sorted alphabetically and numerically, and layed out in single or double columns. An asterisk indicates the categories splitted over several page. Xl, known Xenopus gene; F, Full-Length Open Reading Frame; A, alternative transcript; p, protein similarity; n, nucleotidic similarity; HS, high similarity; MS, medium similarity; WS, weak similarity.
	Fig. 8. (8.21) Marker genes. Whole mount in situ hybridisations of stage 10C, 13, 30 or 4 day embryos are shown. Gene symbol, sequence similarities with gene name or description of the best hit, and GO molecular function classification are indicated. Gene order is alphabetical. The absence of pictures showing early stages results does not necessarily imply an absence of expression, and can be ubiquitous or exceptionally not documented. The reader can find more pictures showing additional views and results from distinct experiments in Axeldb database, and a description of the expression pattern using a controlled vocabulary. Figure panels are presented by gene expression categories in single and double column layering. The expression patterns are sorted alphabetically and numerically, and layed out in single or double columns. An asterisk indicates the categories splitted over several page. Xl, known Xenopus gene; F, Full-Length Open Reading Frame; A, alternative transcript; p, protein similarity; n, nucleotidic similarity; HS, high similarity; MS, medium similarity; WS, weak similarity.
	Fig. 8. (8.22) Marker genes. Whole mount in situ hybridisations of stage 10C, 13, 30 or 4 day embryos are shown. Gene symbol, sequence similarities with gene name or description of the best hit, and GO molecular function classification are indicated. Gene order is alphabetical. The absence of pictures showing early stages results does not necessarily imply an absence of expression, and can be ubiquitous or exceptionally not documented. The reader can find more pictures showing additional views and results from distinct experiments in Axeldb database, and a description of the expression pattern using a controlled vocabulary. Figure panels are presented by gene expression categories in single and double column layering. The expression patterns are sorted alphabetically and numerically, and layed out in single or double columns. An asterisk indicates the categories splitted over several page. Xl, known Xenopus gene; F, Full-Length Open Reading Frame; A, alternative transcript; p, protein similarity; n, nucleotidic similarity; HS, high similarity; MS, medium similarity; WS, weak similarity.
	Fig. 8. (8.23) Marker genes. Whole mount in situ hybridisations of stage 10C, 13, 30 or 4 day embryos are shown. Gene symbol, sequence similarities with gene name or description of the best hit, and GO molecular function classification are indicated. Gene order is alphabetical. The absence of pictures showing early stages results does not necessarily imply an absence of expression, and can be ubiquitous or exceptionally not documented. The reader can find more pictures showing additional views and results from distinct experiments in Axeldb database, and a description of the expression pattern using a controlled vocabulary. Figure panels are presented by gene expression categories in single and double column layering. The expression patterns are sorted alphabetically and numerically, and layed out in single or double columns. An asterisk indicates the categories splitted over several page. Xl, known Xenopus gene; F, Full-Length Open Reading Frame; A, alternative transcript; p, protein similarity; n, nucleotidic similarity; HS, high similarity; MS, medium similarity; WS, weak similarity.
	Fig. 8. (8.24) Marker genes. Whole mount in situ hybridisations of stage 10C, 13, 30 or 4 day embryos are shown. Gene symbol, sequence similarities with gene name or description of the best hit, and GO molecular function classification are indicated. Gene order is alphabetical. The absence of pictures showing early stages results does not necessarily imply an absence of expression, and can be ubiquitous or exceptionally not documented. The reader can find more pictures showing additional views and results from distinct experiments in Axeldb database, and a description of the expression pattern using a controlled vocabulary. Figure panels are presented by gene expression categories in single and double column layering. The expression patterns are sorted alphabetically and numerically, and layed out in single or double columns. An asterisk indicates the categories splitted over several page. Xl, known Xenopus gene; F, Full-Length Open Reading Frame; A, alternative transcript; p, protein similarity; n, nucleotidic similarity; HS, high similarity; MS, medium similarity; WS, weak similarity.
	Fig. 8. (8.25) Marker genes. Whole mount in situ hybridisations of stage 10C, 13, 30 or 4 day embryos are shown. Gene symbol, sequence similarities with gene name or description of the best hit, and GO molecular function classification are indicated. Gene order is alphabetical. The absence of pictures showing early stages results does not necessarily imply an absence of expression, and can be ubiquitous or exceptionally not documented. The reader can find more pictures showing additional views and results from distinct experiments in Axeldb database, and a description of the expression pattern using a controlled vocabulary. Figure panels are presented by gene expression categories in single and double column layering. The expression patterns are sorted alphabetically and numerically, and layed out in single or double columns. An asterisk indicates the categories splitted over several page. Xl, known Xenopus gene; F, Full-Length Open Reading Frame; A, alternative transcript; p, protein similarity; n, nucleotidic similarity; HS, high similarity; MS, medium similarity; WS, weak similarity.
	Fig. 8. (8.26) Marker genes. Whole mount in situ hybridisations of stage 10C, 13, 30 or 4 day embryos are shown. Gene symbol, sequence similarities with gene name or description of the best hit, and GO molecular function classification are indicated. Gene order is alphabetical. The absence of pictures showing early stages results does not necessarily imply an absence of expression, and can be ubiquitous or exceptionally not documented. The reader can find more pictures showing additional views and results from distinct experiments in Axeldb database, and a description of the expression pattern using a controlled vocabulary. Figure panels are presented by gene expression categories in single and double column layering. The expression patterns are sorted alphabetically and numerically, and layed out in single or double columns. An asterisk indicates the categories splitted over several page. Xl, known Xenopus gene; F, Full-Length Open Reading Frame; A, alternative transcript; p, protein similarity; n, nucleotidic similarity; HS, high similarity; MS, medium similarity; WS, weak similarity.
	Fig. 8. (8.27) Marker genes. Whole mount in situ hybridisations of stage 10C, 13, 30 or 4 day embryos are shown. Gene symbol, sequence similarities with gene name or description of the best hit, and GO molecular function classification are indicated. Gene order is alphabetical. The absence of pictures showing early stages results does not necessarily imply an absence of expression, and can be ubiquitous or exceptionally not documented. The reader can find more pictures showing additional views and results from distinct experiments in Axeldb database, and a description of the expression pattern using a controlled vocabulary. Figure panels are presented by gene expression categories in single and double column layering. The expression patterns are sorted alphabetically and numerically, and layed out in single or double columns. An asterisk indicates the categories splitted over several page. Xl, known Xenopus gene; F, Full-Length Open Reading Frame; A, alternative transcript; p, protein similarity; n, nucleotidic similarity; HS, high similarity; MS, medium similarity; WS, weak similarity.
	Fig. 8. (8.28) Marker genes. Whole mount in situ hybridisations of stage 10C, 13, 30 or 4 day embryos are shown. Gene symbol, sequence similarities with gene name or description of the best hit, and GO molecular function classification are indicated. Gene order is alphabetical. The absence of pictures showing early stages results does not necessarily imply an absence of expression, and can be ubiquitous or exceptionally not documented. The reader can find more pictures showing additional views and results from distinct experiments in Axeldb database, and a description of the expression pattern using a controlled vocabulary. Figure panels are presented by gene expression categories in single and double column layering. The expression patterns are sorted alphabetically and numerically, and layed out in single or double columns. An asterisk indicates the categories splitted over several page. Xl, known Xenopus gene; F, Full-Length Open Reading Frame; A, alternative transcript; p, protein similarity; n, nucleotidic similarity; HS, high similarity; MS, medium similarity; WS, weak similarity.
	Fig. 8. (8.29) Marker genes. Whole mount in situ hybridisations of stage 10C, 13, 30 or 4 day embryos are shown. Gene symbol, sequence similarities with gene name or description of the best hit, and GO molecular function classification are indicated. Gene order is alphabetical. The absence of pictures showing early stages results does not necessarily imply an absence of expression, and can be ubiquitous or exceptionally not documented. The reader can find more pictures showing additional views and results from distinct experiments in Axeldb database, and a description of the expression pattern using a controlled vocabulary. Figure panels are presented by gene expression categories in single and double column layering. The expression patterns are sorted alphabetically and numerically, and layed out in single or double columns. An asterisk indicates the categories splitted over several page. Xl, known Xenopus gene; F, Full-Length Open Reading Frame; A, alternative transcript; p, protein similarity; n, nucleotidic similarity; HS, high similarity; MS, medium similarity; WS, weak similarity.
	Fig. 8. (8.30) Marker genes. Whole mount in situ hybridisations of stage 10C, 13, 30 or 4 day embryos are shown. Gene symbol, sequence similarities with gene name or description of the best hit, and GO molecular function classification are indicated. Gene order is alphabetical. The absence of pictures showing early stages results does not necessarily imply an absence of expression, and can be ubiquitous or exceptionally not documented. The reader can find more pictures showing additional views and results from distinct experiments in Axeldb database, and a description of the expression pattern using a controlled vocabulary. Figure panels are presented by gene expression categories in single and double column layering. The expression patterns are sorted alphabetically and numerically, and layed out in single or double columns. An asterisk indicates the categories splitted over several page. Xl, known Xenopus gene; F, Full-Length Open Reading Frame; A, alternative transcript; p, protein similarity; n, nucleotidic similarity; HS, high similarity; MS, medium similarity; WS, weak similarity.
	Fig. 8. (8.31) Marker genes. Whole mount in situ hybridisations of stage 10C, 13, 30 or 4 day embryos are shown. Gene symbol, sequence similarities with gene name or description of the best hit, and GO molecular function classification are indicated. Gene order is alphabetical. The absence of pictures showing early stages results does not necessarily imply an absence of expression, and can be ubiquitous or exceptionally not documented. The reader can find more pictures showing additional views and results from distinct experiments in Axeldb database, and a description of the expression pattern using a controlled vocabulary. Figure panels are presented by gene expression categories in single and double column layering. The expression patterns are sorted alphabetically and numerically, and layed out in single or double columns. An asterisk indicates the categories splitted over several page. Xl, known Xenopus gene; F, Full-Length Open Reading Frame; A, alternative transcript; p, protein similarity; n, nucleotidic similarity; HS, high similarity; MS, medium similarity; WS, weak similarity.
	Fig. 8. (8.32) Marker genes. Whole mount in situ hybridisations of stage 10C, 13, 30 or 4 day embryos are shown. Gene symbol, sequence similarities with gene name or description of the best hit, and GO molecular function classification are indicated. Gene order is alphabetical. The absence of pictures showing early stages results does not necessarily imply an absence of expression, and can be ubiquitous or exceptionally not documented. The reader can find more pictures showing additional views and results from distinct experiments in Axeldb database, and a description of the expression pattern using a controlled vocabulary. Figure panels are presented by gene expression categories in single and double column layering. The expression patterns are sorted alphabetically and numerically, and layed out in single or double columns. An asterisk indicates the categories splitted over several page. Xl, known Xenopus gene; F, Full-Length Open Reading Frame; A, alternative transcript; p, protein similarity; n, nucleotidic similarity; HS, high similarity; MS, medium similarity; WS, weak similarity.
	Fig. 8. (8.33) Marker genes. Whole mount in situ hybridisations of stage 10C, 13, 30 or 4 day embryos are shown. Gene symbol, sequence similarities with gene name or description of the best hit, and GO molecular function classification are indicated. Gene order is alphabetical. The absence of pictures showing early stages results does not necessarily imply an absence of expression, and can be ubiquitous or exceptionally not documented. The reader can find more pictures showing additional views and results from distinct experiments in Axeldb database, and a description of the expression pattern using a controlled vocabulary. Figure panels are presented by gene expression categories in single and double column layering. The expression patterns are sorted alphabetically and numerically, and layed out in single or double columns. An asterisk indicates the categories splitted over several page. Xl, known Xenopus gene; F, Full-Length Open Reading Frame; A, alternative transcript; p, protein similarity; n, nucleotidic similarity; HS, high similarity; MS, medium similarity; WS, weak similarity.
	Fig. 8. (8.34) Marker genes. Whole mount in situ hybridisations of stage 10C, 13, 30 or 4 day embryos are shown. Gene symbol, sequence similarities with gene name or description of the best hit, and GO molecular function classification are indicated. Gene order is alphabetical. The absence of pictures showing early stages results does not necessarily imply an absence of expression, and can be ubiquitous or exceptionally not documented. The reader can find more pictures showing additional views and results from distinct experiments in Axeldb database, and a description of the expression pattern using a controlled vocabulary. Figure panels are presented by gene expression categories in single and double column layering. The expression patterns are sorted alphabetically and numerically, and layed out in single or double columns. An asterisk indicates the categories splitted over several page. Xl, known Xenopus gene; F, Full-Length Open Reading Frame; A, alternative transcript; p, protein similarity; n, nucleotidic similarity; HS, high similarity; MS, medium similarity; WS, weak similarity.
	Fig. 9. (9.1) Marker genes. Whole mount in situ hybridisations of stage 10C, 13, 30 or 4 day embryos are shown. Gene symbol, sequence similarities with gene name or description of the best hit, and GO molecular function classification are indicated. Gene order is alphabetical. The absence of pictures showing early stages results does not necessarily imply an absence of expression, and can be ubiquitous or exceptionally not documented. The reader can find more pictures showing additional views and results from distinct experiments in Axeldb database, and a description of the expression pattern using a controlled vocabulary. Figure panels are presented by gene expression categories in single and double column layering. The expression patterns are sorted alphabetically and numerically, and layed out in single or double columns. An asterisk indicates the categories splitted over several page. Xl, known Xenopus gene; F, Full-Length Open Reading Frame; A, alternative transcript; p, protein similarity; n, nucleotidic similarity; HS, high similarity; MS, medium similarity; WS, weak similarity.
	Fig. 9. (9.2) Marker genes. Whole mount in situ hybridisations of stage 10C, 13, 30 or 4 day embryos are shown. Gene symbol, sequence similarities with gene name or description of the best hit, and GO molecular function classification are indicated. Gene order is alphabetical. The absence of pictures showing early stages results does not necessarily imply an absence of expression, and can be ubiquitous or exceptionally not documented. The reader can find more pictures showing additional views and results from distinct experiments in Axeldb database, and a description of the expression pattern using a controlled vocabulary. Figure panels are presented by gene expression categories in single and double column layering. The expression patterns are sorted alphabetically and numerically, and layed out in single or double columns. An asterisk indicates the categories splitted over several page. Xl, known Xenopus gene; F, Full-Length Open Reading Frame; A, alternative transcript; p, protein similarity; n, nucleotidic similarity; HS, high similarity; MS, medium similarity; WS, weak similarity.
	Fig. 9. (9.3) Marker genes. Whole mount in situ hybridisations of stage 10C, 13, 30 or 4 day embryos are shown. Gene symbol, sequence similarities with gene name or description of the best hit, and GO molecular function classification are indicated. Gene order is alphabetical. The absence of pictures showing early stages results does not necessarily imply an absence of expression, and can be ubiquitous or exceptionally not documented. The reader can find more pictures showing additional views and results from distinct experiments in Axeldb database, and a description of the expression pattern using a controlled vocabulary. Figure panels are presented by gene expression categories in single and double column layering. The expression patterns are sorted alphabetically and numerically, and layed out in single or double columns. An asterisk indicates the categories splitted over several page. Xl, known Xenopus gene; F, Full-Length Open Reading Frame; A, alternative transcript; p, protein similarity; n, nucleotidic similarity; HS, high similarity; MS, medium similarity; WS, weak similarity.
	Fig. 9. (9.4) Marker genes. Whole mount in situ hybridisations of stage 10C, 13, 30 or 4 day embryos are shown. Gene symbol, sequence similarities with gene name or description of the best hit, and GO molecular function classification are indicated. Gene order is alphabetical. The absence of pictures showing early stages results does not necessarily imply an absence of expression, and can be ubiquitous or exceptionally not documented. The reader can find more pictures showing additional views and results from distinct experiments in Axeldb database, and a description of the expression pattern using a controlled vocabulary. Figure panels are presented by gene expression categories in single and double column layering. The expression patterns are sorted alphabetically and numerically, and layed out in single or double columns. An asterisk indicates the categories splitted over several page. Xl, known Xenopus gene; F, Full-Length Open Reading Frame; A, alternative transcript; p, protein similarity; n, nucleotidic similarity; HS, high similarity; MS, medium similarity; WS, weak similarity.
	Fig. 9. (9.5) Marker genes. Whole mount in situ hybridisations of stage 10C, 13, 30 or 4 day embryos are shown. Gene symbol, sequence similarities with gene name or description of the best hit, and GO molecular function classification are indicated. Gene order is alphabetical. The absence of pictures showing early stages results does not necessarily imply an absence of expression, and can be ubiquitous or exceptionally not documented. The reader can find more pictures showing additional views and results from distinct experiments in Axeldb database, and a description of the expression pattern using a controlled vocabulary. Figure panels are presented by gene expression categories in single and double column layering. The expression patterns are sorted alphabetically and numerically, and layed out in single or double columns. An asterisk indicates the categories splitted over several page. Xl, known Xenopus gene; F, Full-Length Open Reading Frame; A, alternative transcript; p, protein similarity; n, nucleotidic similarity; HS, high similarity; MS, medium similarity; WS, weak similarity.
	Fig. 9. (9.6) Marker genes. Whole mount in situ hybridisations of stage 10C, 13, 30 or 4 day embryos are shown. Gene symbol, sequence similarities with gene name or description of the best hit, and GO molecular function classification are indicated. Gene order is alphabetical. The absence of pictures showing early stages results does not necessarily imply an absence of expression, and can be ubiquitous or exceptionally not documented. The reader can find more pictures showing additional views and results from distinct experiments in Axeldb database, and a description of the expression pattern using a controlled vocabulary. Figure panels are presented by gene expression categories in single and double column layering. The expression patterns are sorted alphabetically and numerically, and layed out in single or double columns. An asterisk indicates the categories splitted over several page. Xl, known Xenopus gene; F, Full-Length Open Reading Frame; A, alternative transcript; p, protein similarity; n, nucleotidic similarity; HS, high similarity; MS, medium similarity; WS, weak similarity.
	Fig. 10. Analysis of tissue-relatedness. The expression profiles for the 723 genes were arranged in a presence/absence matrix. This matrix was analysed by double hierarchical clustering (Eisen et al., 1998). The resulting tree obtained for the tissues (anatomical structures scored) is shown. Branches are coloured according to their germ layer of origin as in Fig. 6. Length of lines corresponds to the relative distance between tissue scores (termed: tissue relatedness). G, gastrula; N, neurula; T, tailbud.
	has-rs (hyaluronan synthase related sequence protein) gene expression in Xenopus laevis embryo, assayed via in situ hybridization, NF stage 11, horizontal view, animal up.
	loc100490316 (loc100490316) gene expression in Xenopus laevis embryo, assayed via in situ hybridization, NF stage 28, lateral view, anterior left, dorsal up.
	loc108705532 (loc108705532) gene expression in Xenopus laevis embryo, assayed via in situ hybridization, NF stage 28, lateral view, anterior left, dorsal up.
	nt5c2 (5'-nucleotidase, cytosolic II ) gene expression in Xenopus laevis embryo, assayed via in situ hybridization, NF stage 28, lateral view, anterior left, dorsal up.
	sgk1 (serum/glucocorticoid regulated kinase 1) gene expression in Xenopus laevis embryo, assayed via in situ hybridization, NF stage 28, lateral view, anterior left, dorsal up.
	tent2 (terminal nucleotidyltransferase 2) gene expression in Xenopus laevis embryo, assayed via in situ hybridization, NF stage 28, lateral view, anterior left, dorsal up.