title: Opioid peptides in the testis and the male genital tract: presence and possible function.
mesh_terms: D000727:Androgen-Binding Protein / Q000032:analysis; D004723:Endorphins / Q000032:analysis*; D005048:Etorphine / Q000032:analysis; D005837:Genitalia, Male / Q000032:analysis*; D006801:Humans; D008297:Male; D012661:Semen / Q000032:analysis; D013737:Testis / Q000032:analysis*; D001615:beta-Endorphin
chemical_list: D000727:Androgen-Binding Protein; D004723:Endorphins; D005048:Etorphine; D001615:beta-Endorphin