SEARCH Articles Figures Tables Assay of cholesterol 7a-hydroxylase in liver microsomes Cholesterol 7 a-hydroxylase Cholesterol 7a-hydroxylase Cholesterol la-hydroxylase Enzymes 7- hydroxylase activity cholesterol Hepatic cholesterol 7a-hydroxylase Possible mechanisms for regulation of cholesterol 7a-hydroxylase activity Relation between cholesterol 7a-hydroxylase and HMG-CoA reductase