title: In vivo transcription of the spacer sequences of rDNA in Xenopus.
mesh_terms: D000818:Animals; D001001:Anura; D001483:Base Sequence; D002460:Cell Line; D046508:Culture Techniques; D004247:DNA / Q000378:metabolism*; D005260:Female; D005472:Fluorouracil / Q000494:pharmacology; D009693:Nucleic Acid Hybridization; D009865:Oocytes / Q000378:metabolism*; D010063:Ovum / Q000378:metabolism*; D012335:RNA, Ribosomal / Q000096:biosynthesis*; D014158:Transcription, Genetic; D014529:Uridine / Q000031:analogs & derivatives / Q000494:pharmacology; D014981:Xenopus
chemical_list: D012335:RNA, Ribosomal; D004247:DNA; D005472:Fluorouracil; D014529:Uridine