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Biochemistry
The first step in synthesis of steroids is derived from the cleavage of cholesterol. What is the enzyme responsible for the cleavage of 20,22-dehydrocholesterol to pregnenolone?
Delta 5-3 beta-hydroxysteroid dehydrogenase (3B - HSD)
HMG-CoA reductase
Aromatase
17 alpha-hydroxylase
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