<prompt> PAN-SH site of fatty acid synthase complex acceptsAcetyl CoAMalonyl CoAPropionyl CoAAll  <response>: Malonyl - CoA Central thiol or Pan -SH or 4-phosphopantetheine of ACP Accepts malonyl groupPeripheral thiol or cysteine -SH group of 3-ketoacyl synthase Accepts acetyl group 