Evolutionary stability of the histone genes of sea urchins.

Animals Bacillus subtilis Base Sequence Biological Evolution Chickens DNA DNA, Bacterial Drug Stability Electrophoresis, Polyacrylamide Gel Embryo, Mammalian/metabolism Embryo, Nonmammalian Filtration Genes Histones/biosynthesis Invertebrates Mice Nucleic Acid Hybridization Plants Polyribosomes/metabolism RNA, Messenger Salmon Sea Urchins/metabolism Selection, Genetic Tritium Uridine/metabolism Xenopus

DNA, Bacterial Histones RNA, Messenger Tritium DNA Uridine