Purity >90% by SDS-PAGE, MW: 37.4 kDa. AIDA Human Recombinant produced in E.Coli is a single, non-glycosylated polypeptide chain containing 329 amino acids (1-306 a.a) and having a molecular mass of 37.4kDa. AIDA is fused to a 23 amino acid His-tag at N-terminus and purified by proprietary chromatographic techniques.