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