Larger Image ube2s gene expression in Xenopus laevis embryo via in situ hybridization, NF stage 28, lateral view, anterior left. Copyright © Papalopulu Lab, Nancy Papalopulu Copyright © Papalopulu Lab Gene Synonyms Species Stage(s) Tissue ube2s e2-epf, e2epf, epf5, ube2s-a, ube2s-b X. tropicalis Throughout NF stage 28 eye neural crest pharyngeal arch somite tail bud head region neuroectoderm paraxial mesoderm Image source: Community submitted Permanent Image Page Printer Friendly View XB-IMG-24177