Steroid 17-alpha-hydroxylase/17,20 lyase CYP17A1 Cytochrome P450-C17 CYPXVII 509 MWVLLAVFLLTLAYLFWPKTKHSGAKYPRSLPSLPLVGSLPFLPRRGQQHENFFKLQEKYGPIYSFRLGSKTTVMIGHHQLAREVLLKKGKEFSGRPKVATLDILSDNQKGIAFADHGAHWQLHRKLVLNAFALFKDGNLKLEKIINQEANVLCDFLATQHGQSIDLSEPLSLAVTNIISFICFNFSFKNEDPALKAIQNVNDGILEVLGKEVLLDIFPALKIFPSKAMEKMKGCVETRNELLSEILEKCQENFTSDSITNLLHILMQAKVNADNNNTGPEQDSKLLSNRHMLATIADIFGAGVETTTSVIKWIVAYLLHHPSLKKRIQDSIDQNIGFNRTPTISDRNRLVLLEATIREVLRIRPVAPMLIPHKAIIDSSIGDLTIDKGTDVVVNLWALHHNEKEWQQPDLFMPERFLDPTGTQLISPSLSYLPFGAGPRSCVGEMLARQELFLFMSRLLQRFNLEIPDDGKLPSLEGNPSLVLQIKPFKVKIEVRQAWKEAQAEGSTS CYP17 Cytochrome P450 17A1 CP17A_SHEEP Conversion of pregnenolone and progesterone to their 17- alpha-hydroxylated products and subsequently to dehydroepiandrosterone (DHEA) and androstenedione. Catalyzes both the 17-alpha-hydroxylation and the 17,20-lyase reaction. Involved in sexual development during fetal life and at puberty.