Purity >90% by SDS-PAGE, MW: 26.0 kDa. GFER Human Recombinant produced in E.Coli is a single, non-glycosylated polypeptide chain containing 229 amino acids (1-205 a.a) and having a molecular mass of 26kDa.GFER is fused to a 24 amino acid His-tag at N-terminus and purified by proprietary chromatographic techniques.