obsolete fatty-acyl-[acp] elongase/decarboxylase activity (obsolete GO:0102332)
OBSOLETE. Catalysis of the reaction: malonyl-CoA + H+ + a long-chain acyl-[acp] + a reduced electron acceptor = 2 carbon dioxide + coenzyme A + a terminal olefin + a holo-[acyl-carrier protein] + an oxidized electron acceptor.