title: Reduction of ribosomal RNA synthesis and ribosomal RNA genes in a mutant of Xenopus laevis which organizes only a partial nucleolus. II. The number of ribosomal RNA genes in animals of different nucleolar types.
mesh_terms: D000818:Animals; D001001:Anura; D002460:Cell Line; D002466:Cell Nucleolus; D046508:Culture Techniques; D004247:DNA; D005796:Genes; D005815:Genetic Code; D006824:Hybridization, Genetic; D009154:Mutation; D009705:Nucleosides / Q000378:metabolism; D012313:RNA / Q000096:biosynthesis*; D012270:Ribosomes / Q000378:metabolism; D014316:Tritium; D014529:Uridine / Q000378:metabolism
chemical_list: D009705:Nucleosides; D014316:Tritium; D012313:RNA; D004247:DNA; D014529:Uridine