Greater than 90.0% as determined by SDS-PAGE. KAT2A Human Recombinant produced in E.Coli is a single, non-glycosylated polypeptide chain containing 447 amino acids (411-837 a.a) and having a molecular mass of 51.1kDa. KAT2A is fused to a 20 amino acid His-tag at N-terminus; purified by proprietary chromatographic techniques. KAT2A protein solution (0.25mg/ml) containing 20mM Tris-HCl buffer (pH 8.0), 5mM DTT, 40% glycerol, 200mM NaCl and 1mM EDTA.