(3R)-3-isocyanylbutanoyl-[ACP] + AMP + diphosphate => (3R)-3-isocyanylbutanoate + holo-[ACP] + ATP
(3r)-3-isocyanylbutanoyl-[acp] + amp + diphosphate => (3r)-3-isocyanylbutanoate + holo-[acp] + atp
(3R)-3-isocyanylbutanoyl-[ACP] + AMP + diphosphate => (3R)-3-isocyanylbutanoate + holo-[ACP] + ATP
(3r)-3-isocyanylbutanoyl-[acp] + amp + diphosphate => (3r)-3-isocyanylbutanoate + holo-[acp] + atp