Purity > 90% as determined by SDS-PAGE. MW: 35.2kDa. Full Length of Mature Protein: 2-169aa. N-terminal 6xHis-SUMO-tagged. Escherichia coli O157:H7. Roves the formyl group from the N-terminal Met of newly synthesized proteins. Requires at least a dipeptide for an efficient rate of reaction. N-terminal L-methionine is a prerequisite for activity but the enzyme has broad specificity at other positions.