title: 5 S DNAs of Xenopus laevis and Xenopus mulleri: evolution of a gene family.
mesh_terms: D000818:Animals; D001483:Base Sequence; D005075:Biological Evolution; D002499:Centrifugation, Density Gradient; D002875:Chromosomes; D003090:Coliphages; D004247:DNA / Q000302:isolation & purification*; D004279:DNA, Viral; D003720:Densitometry; D005796:Genes; D005815:Genetic Code; D006358:Hot Temperature; D008970:Molecular Weight; D009691:Nucleic Acid Denaturation; D009693:Nucleic Acid Hybridization; D010759:Phosphorus Isotopes; D012313:RNA; D014316:Tritium; D014981:Xenopus
chemical_list: D004279:DNA, Viral; D010759:Phosphorus Isotopes; D014316:Tritium; D012313:RNA; D004247:DNA