title: Enrichment and purification of sea urchin histone genes.
mesh_terms: D002499:Centrifugation, Density Gradient; D004247:DNA / Q000235:genetics* / Q000302:isolation & purification; D005796:Genes; D006657:Histones / Q000235:genetics*; D008722:Methods; D009690:Nucleic Acid Conformation; D009693:Nucleic Acid Hybridization; D012333:RNA, Messenger; D012617:Sea Urchins
chemical_list: D006657:Histones; D012333:RNA, Messenger; D004247:DNA