. "\"Catalysis of the reaction: trans-2,3-didehydroacyl-CoA + NADP+ = trans,trans-2,3,4,5-tetradehydroacyl-CoA + NADPH + H+.\" [EC:1.3.1.34]" . . "2,4-dienoyl-CoA reductase (NADPH) activity" . "4-enoyl coenzyme A (reduced nicotinamide adenine dinucleotide phosphate) reductase activity" . "4-enoyl-CoA reductase (NADPH) activity" . "4-enoyl-CoA reductase (NADPH2)" . "4-enoyl-CoA reductase activity" . "trans-2,3-didehydroacyl-CoA:NADP+ 4-oxidoreductase activity" . "EC:1.3.1.34" . "MetaCyc:DIENOYLCOAREDUCT-RXN" . .