title: Male "pill" blocks sperm enzyme.
mesh_terms: D000818:Animals; D003272:Contraceptive Agents, Male / Q000494:pharmacology*; D005982:Glutathione Transferase / Q000037:antagonists & inhibitors; D006072:Gossypol / Q000494:pharmacology*; D006801:Humans; D007527:Isoenzymes; D007770:L-Lactate Dehydrogenase / Q000037:antagonists & inhibitors*; D008297:Male; D012377:Rodentia; D013094:Spermatozoa / Q000187:drug effects / Q000201:enzymology
chemical_list: D003272:Contraceptive Agents, Male; D007527:Isoenzymes; D007770:L-Lactate Dehydrogenase; D005982:Glutathione Transferase; D006072:Gossypol