title: The fine structure of nuclei in mature sperm. I. Application of the Langmuir trough-critical point method to histone-containing sperm nuclei.
mesh_terms: D000818:Animals; D001001:Anura; D001120:Arginine / Q000032:analysis; D002417:Cattle; D002467:Cell Nucleus / Q000032:analysis*; D002875:Chromosomes; D003530:Cyprinidae; D004447:Echinodermata; D006651:Histocytochemistry; D006657:Histones / Q000032:analysis*; D007668:Kidney / Q000166:cytology; D008297:Male; D008722:Methods; D008854:Microscopy, Electron; D013094:Spermatozoa / Q000166:cytology*
chemical_list: D006657:Histones; D001120:Arginine