title: A histone programme during the life cycle of the sea urchin.
abstract: The histone complement of chromatin from early gastrula, late gastrula and from fully differentiated gut cells of the sea urchin Parechinus angulosus has been fractionated by molecular sieve and ion-exchange chromatography. Several of the subfractions thus isolated have been characterized by amino acid composition and partial amino acid sequences as a series of variants of the histones H1, H2A and H2B. Specific histone variants are present in chromatin at specific stages of differentiation.
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D006657:Histones / Q000096:biosynthesis / Q000235:genetics / Q000502:physiology*; D008297:Male; D012617:Sea Urchins / Q000196:embryology* / Q000378:metabolism; D013094:Spermatozoa / Q000378:metabolism
chemical_list: D006657:Histones