Long-chain acyl-(acyl-carrier-protein) reductase (, long-chain acyl-[acp] reductase, fatty acyl-[acyl-carrier-protein] reductase, acyl-[acp] reductase) is an enzyme with systematic name long-chain-aldehyde:NAD(P)<sup>+</sup> oxidoreductase (acyl-(acyl-carrier protein)-forming). This enzyme catalyses the following chemical reaction
This enzyme catalyses the reaction in the opposite direction.