hexadecanoyl-AMP + holo-[(hydroxy)phthioceranic acid synthase] => hexadecanoyl-[(hydroxy)phthioceranic acid synthase] + AMP + H(+)
hexadecanoyl-amp + holo-[(hydroxy)phthioceranic acid synthase] => hexadecanoyl-[(hydroxy)phthioceranic acid synthase] + amp + h(+)