title: Studies on an extracellular coat of mammalian sperm with reference to its DNA content.
mesh_terms: D000818:Animals; D002462:Cell Membrane / Q000648:ultrastructure*; D003574:Cytochrome c Group; D003584:Cytological Techniques; D004247:DNA / Q000032:analysis*; D006651:Histocytochemistry; D006801:Humans; D008297:Male; D051379:Mice; D008854:Microscopy, Electron; D051381:Rats; D012756:Sheep; D013045:Species Specificity; D013094:Spermatozoa / Q000032:analysis / Q000648:ultrastructure*
chemical_list: D003574:Cytochrome c Group; D004247:DNA