title: The isolation of genes.
mesh_terms: D000818:Animals; D004247:DNA / Q000302:isolation & purification*; D005796:Genes; D005815:Genetic Code; D009693:Nucleic Acid Hybridization; D012335:RNA, Ribosomal / Q000096:biosynthesis*; D014981:Xenopus
chemical_list: D012335:RNA, Ribosomal; D004247:DNA