title: Increase in trypsin resistance of the posterior portion of the rat sperm head upon entering the epididymis.
mesh_terms: D000818:Animals; D002918:Chymotrypsin / Q000494:pharmacology*; D004822:Epididymis; D008297:Male; D051381:Rats; D011919:Rats, Inbred Strains; D013077:Sperm Head / Q000187:drug effects*; D013083:Sperm Transport / Q000187:drug effects*; D013094:Spermatozoa / Q000187:drug effects*; D014357:Trypsin / Q000494:pharmacology*
chemical_list: D002918:Chymotrypsin; D014357:Trypsin