Purity > 90% as determined by SDS-PAGE. MW: 44kDa. Full Length: 1-256aa. N-terminal 6xHis-SUMO-tagged. Staphylococcus aureus (strain MRSA252). Catalyzes the reduction of a carbon-carbon double bond in an enoyl moiety that is covalently linked to an acyl carrier protein (ACP). Involved in the elongation cycle of fatty acid which are used in the lipid metabolism (By similarity).