Purity ~90% (SDS-PAGE). Has an important function as a repair enzyme for proteins that have been inactivated by oxidation. Catalyzes the reversible oxidation-reduction of methionine sulfoxide in proteins to methionine. Source: Recombinant protein corresponding to aa24-235 from human MRSA, fused to His-Tag at N-terminal, expressed in E. coli. Molecular Weight: ~27.5kD AA