Fig. 1From: Pregnenolone and progesterone production from natural sterols using recombinant strain of Mycolicibacterium smegmatis mc2 155 expressing mammalian steroidogenesis systemSchematic representation of the general organization of the mammalian cholesterol hydroxylase/C20-C22 lyase system in adrenocortical mitochondria. Cytochrome P450scc catalyzes the reaction of the cleavage of cholesterol side chain to form pregnenoloneBack to article page