title: Sea urchin sperm chromatin structure as probed by pancreatic DNase I: evidence for a noval cutting periodicity.
mesh_terms: D000818:Animals; D002467:Cell Nucleus / Q000378:metabolism; D002843:Chromatin / Q000648:ultrastructure*; D004247:DNA / Q000032:analysis; D003851:Deoxyribonucleases / Q000378:metabolism; D006657:Histones / Q000032:analysis; D008297:Male; D008970:Molecular Weight; D010179:Pancreas / Q000201:enzymology; D010507:Periodicity; D012617:Sea Urchins; D013094:Spermatozoa / Q000648:ultrastructure*
chemical_list: D002843:Chromatin; D006657:Histones; D004247:DNA; D003851:Deoxyribonucleases