What is 17-Hydroxylase, Steroid?
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A steroid hydroxylase system found in the microsomal membrane of the steroid-hormone producing tissues. It catalyzes the 17-hydroxylation of steroids, such as progesterone or pregnenolone in the presence of NADPH and molecular oxygen. This is an important step in the biosynthesis of steroid hormones. EC 1.14.99.9.