using a cloned leydig tumor cell line ( designated ma-10 ) , we have studied the activity of cholesterol side-chain ( cscc ) enzyme , the rate-determining step in steroidogenesis , in mitochondria isolated from cells pretreated either with human chorionic gonadotropin ( hcg ) or dibutyryl cyclic adenosine monophosphate ( dbcamp ) .
C0026237
mitochondria
C0007634
cells