CD40 Human Recombinant produced in E.Coli is a single,non-glycosylated polypeptide chain containing 196 amino acids (21-193a.a) andhaving a molecular mass of 21.6kDa.CD40 is fused to a 23 amino acid His-tag at N-terminus& purified by proprietary chromatographic techniques. Purity >90.0% as determined by SDS-PAGE.