title: Blockage of fertilization in Rana pipiens by trypsin inhibitors.
mesh_terms: D000818:Animals; D001001:Anura; D005260:Female; D005306:Fertilization / Q000187:drug effects*; D008297:Male; D010447:Peptide Hydrolases; D011894:Rana pipiens; D013094:Spermatozoa / Q000201:enzymology* / Q000378:metabolism; D014361:Trypsin Inhibitors / Q000494:pharmacology*
chemical_list: D014361:Trypsin Inhibitors; D010447:Peptide Hydrolases