Side-chain cleavage of C21 steroids to C19 steroids by testicular microsomal cytochrome P-450: 17alpha-hydroxy C21 steroids as obligatory intermediates.
D006907:17-alpha-Hydroxypregnenolone / Q000378:metabolism*; D000728:Androgens / Q000378:metabolism*; D000735:Androstenedione / Q000096:biosynthesis; D000818:Animals; D003577:Cytochrome P-450 Enzyme System / Q000378:metabolism*; D003687:Dehydroepiandrosterone / Q000096:biosynthesis; D006908:Hydroxyprogesterones / Q000378:metabolism*; D008297:Male; D008861:Microsomes / Q000201:enzymology*; D011284:Pregnenolone / Q000378:metabolism; D011374:Progesterone / Q000378:metabolism; D013552:Swine; D013737:Testis / Q000201:enzymology*
D000728:Androgens; D006908:Hydroxyprogesterones; D006907:17-alpha-Hydroxypregnenolone; D000735:Androstenedione; D003687:Dehydroepiandrosterone; D011374:Progesterone; D011284:Pregnenolone; D003577:Cytochrome P-450 Enzyme System