Trans-
2-enoyl-ACP is an intermediate in fatty acid biosynthesis. It
is formed in the reaction that follows,
D-3-Hydroxyacyl-ACP <=> Trans-
2-enoyl-ACP + H2O (catalyzed by 3-Hydroxylacyl-ACP Dehydrogenase)
and is converted to acyl-ACP in the next reaction:
Trans-
2-enoyl-ACP + NADPH + H+ <=> Acyl-ACP + NADP+(catalyzed by Enoyl-ACP Reductase)