title: Histone patterns during early embryogenesis in the euchiuroid Urechis caupo.
abstract: Histones were isolated from nuclei of Urechis caupo unfertilized eggs and embryos from early cleavage through gastrula. Polyacrylamide gel electrophoresis showed the presence of a slow migrating H1s fraction in the egg which was replaced by a faster migrating H1 during development. Radioactive labelling showed no synthesis of H1s from fertilization up to gastrula and a high rate of synthesis of H1 relative to the other histones during cleavage and blastula stages.
mesh_terms: D005260:Female; D005775:Gastrula / Q000378:metabolism; D006657:Histones / Q000096:biosynthesis / Q000378:metabolism*; D007448:Invertebrates / Q000196:embryology*; D015053:Zygote / Q000378:metabolism
chemical_list: D006657:Histones