TK2 Human Recombinant produced in E.Coli is a single, non-glycosylated polypeptide chain containing 257 amino acids (34-265 a.a) and having a molecular mass of 30.2kDa. TK2 is fused to a 25 amino acid His-tag at N-terminus & purified by proprietary chromatographic techniques. Purity >85% as determined by SDS-PAGE.