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Purification and transcriptional analysis of RNA polymerase I holoenzymes from broccoli (Brassica oleracea) and frog (Xenopus laevis). , Saez-Vasquez J, Albert AC, Earley K, Pikaard CS ., Methods Enzymol. January 1, 2003; 370 121-38.
Xenopus ribosomal RNA gene intergenic spacer elements conferring transcriptional enhancement and nucleolar dominance-like competition in oocytes. , Caudy AA, Pikaard CS ., J Biol Chem. August 30, 2002; 277 (35): 31577-84.
Histone acetyltransferase and protein kinase activities copurify with a putative Xenopus RNA polymerase I holoenzyme self-sufficient for promoter-dependent transcription. , Albert AC, Denton M, Kermekchiev M, Pikaard CS ., Mol Cell Biol. January 1, 1999; 19 (1): 796-806.
Nucleosome binding by the polymerase I transactivator upstream binding factor displaces linker histone H1. , Kermekchiev M, Workman JL, Pikaard CS ., Mol Cell Biol. October 1, 1997; 17 (10): 5833-42.
The RNA polymerase I transactivator upstream binding factor requires its dimerization domain and high-mobility-group (HMG) box 1 to bend, wrap, and positively supercoil enhancer DNA. , Putnam CD, Copenhaver GP, Denton ML, Pikaard CS ., Mol Cell Biol. October 1, 1994; 14 (10): 6476-88.
The RNA polymerase I transcription factor UBF is a sequence-tolerant HMG-box protein that can recognize structured nucleic acids. , Copenhaver GP, Putnam CD, Denton ML, Pikaard CS ., Nucleic Acids Res. July 11, 1994; 22 (13): 2651-7.
Ribosomal gene promoter domains can function as artificial enhancers of RNA polymerase I transcription, supporting a promoter origin for natural enhancers in Xenopus. , Pikaard CS ., Proc Natl Acad Sci U S A. January 18, 1994; 91 (2): 464-8.
Functional analysis of Arabidopsis thaliana rRNA gene and spacer promoters in vivo and by transient expression. , Doelling JH, Gaudino RJ, Pikaard CS ., Proc Natl Acad Sci U S A. August 15, 1993; 90 (16): 7528-32.
Cooperative binding of the Xenopus RNA polymerase I transcription factor xUBF to repetitive ribosomal gene enhancers. , Putnam CD, Pikaard CS ., Mol Cell Biol. November 1, 1992; 12 (11): 4970-80.
xUBF and Rib 1 are both required for formation of a stable polymerase I promoter complex in X. laevis. , McStay B, Hu CH, Pikaard CS , Reeder RH., EMBO J. August 1, 1991; 10 (8): 2297-303.
Enhancers for RNA polymerase I in mouse ribosomal DNA. , Pikaard CS , Pape LK, Henderson SL, Ryan K, Paalman MH, Lopata MA, Reeder RH, Sollner-Webb B., Mol Cell Biol. September 1, 1990; 10 (9): 4816-25.
rUBF, an RNA polymerase I transcription factor from rats, produces DNase I footprints identical to those produced by xUBF, its homolog from frogs. , Pikaard CS , Smith SD, Reeder RH, Rothblum L., Mol Cell Biol. July 1, 1990; 10 (7): 3810-2.
Molecular mechanisms governing species-specific transcription of ribosomal RNA. , Bell SP, Pikaard CS , Reeder RH, Tjian R., Cell. November 3, 1989; 59 (3): 489-97.
The Xenopus ribosomal gene enhancers bind an essential polymerase I transcription factor, xUBF. , Pikaard CS , McStay B, Schultz MC, Bell SP, Reeder RH., Genes Dev. November 1, 1989; 3 (11): 1779-88.
Sequence elements essential for function of the Xenopus laevis ribosomal DNA enhancers. , Pikaard CS , Reeder RH., Mol Cell Biol. October 1, 1988; 8 (10): 4282-8.