a (3R)-3-isocyanyl-fatty acid + holo-[ACP] + ATP => a (3R)-3-isocyanyl-fatty acyl-[ACP] + AMP + diphosphate
a (3r)-3-isocyanyl-fatty acid + holo-[acp] + atp => a (3r)-3-isocyanyl-fatty acyl-[acp] + amp + diphosphate