The enzyme completes each cycle of fatty acid elongation by catalysing the stereospecific reduction of the double bond at position 2 of a growing fatty acid chain, while linked to the acyl-carrier protein, in an NADPH-dependent manner. This entry stands for enzymes whose stereo-specificity with respect to NADP+ is not known. [cf. EC
1.3.1.39 enoyl-[acyl-carrier-protein] reductase (NADPH, Re-specific), EC
1.3.1.10, enoyl-[acyl-carrier-protein] reductase (NADPH, Si-specific) and EC
1.3.1.9, enoyl-[acyl-carrier-protein] reductase (NADH)].