title: Isolation of basic acrosin inhibitor from bull seminal plasma (BUSI II).
abstract: An acrosin inhibitor was isolated from bull seminal plasma by gel filtration on Sephadex G-50 fine and ion-exchange chromatography on CM-Sephadex. The inhibitor is a basic polypeptide (pl greater than or equal to 10.5) of molecular weight 6 200 (calculated from amino acid composition). Its N-terminal amino group is blocked. The inhibitor is not strictly specific in its effect since it also inhibits trypsin and to a lesser degree chymotrypsin, in addition to bull and boar acrosin.
mesh_terms: D000176:Acrosin / Q000037:antagonists & inhibitors*; D000596:Amino Acids / Q000032:analysis; D000818:Animals; D002417:Cattle; D002918:Chymotrypsin / Q000037:antagonists & inhibitors; D008297:Male; D008970:Molecular Weight; D010455:Peptides / Q000302:isolation & purification* / Q000494:pharmacology; D011480:Protease Inhibitors; D012661:Semen / Q000032:analysis* / Q000201:enzymology; D013379:Substrate Specificity; D014361:Trypsin Inhibitors
chemical_list: D000596:Amino Acids; D010455:Peptides; D011480:Protease Inhibitors; D014361:Trypsin Inhibitors; D002918:Chymotrypsin; D000176:Acrosin