title: Beta-endorphin, Met-enkephalin, and calcitonin in human semen: evidence for a possible role in human sperm motility.
mesh_terms: D002116:Calcitonin / Q000378:metabolism / Q000494:pharmacology; D004723:Endorphins / Q000378:metabolism / Q000494:pharmacology; D004744:Enkephalin, Methionine / Q000378:metabolism / Q000494:pharmacology; D006801:Humans; D066298:In Vitro Techniques; D008297:Male; D010455:Peptides / Q000378:metabolism*; D012661:Semen / Q000378:metabolism*; D013081:Sperm Motility / Q000187:drug effects; D001615:beta-Endorphin
chemical_list: D004723:Endorphins; D010455:Peptides; D004744:Enkephalin, Methionine; D001615:beta-Endorphin; D002116:Calcitonin