ID 1.3.1.86 DE crotonyl-CoA reductase. AN 3-hydroxyacyl CoA reductase. AN butyryl-CoA dehydrogenase. AN enoyl-coenzyme A reductase. AN ethylene reductase. AN short-chain acyl-coenzyme A dehydrogenase. AN unsaturated acyl coenzyme A reductase. CA butanoyl-CoA + NADP(+) = (2E)-butenoyl-CoA + H(+) + NADPH. CC -!- Catalyzes the reaction in the reverse direction. CC -!- This enzyme from Streptomyces collinus is specific for (E)-but-2- CC enoyl-CoA, and is proposed to provide butanoyl-CoA as a starter unit CC for straight-chain fatty acid biosynthesis. DR Q82LU9, CCR_STRAW ; Q53865, CCR_STRCU ; Q5EU90, TER_EUGGR ; //