Recombinant human CD38 protein, C-His (HEK293), with a concentration of >0.5 mg/ml, expressed in HEK293 cell, and a purity of >95% as determined by Tris-Bis PAGE; >95% as determined by SEC-HPLC. It was purified by AC, and has a C-His tag. Due to glycosylation, the protein migrates to 50-60 kDa based on Tris-Bis PAGE result.