There are 5 CD20 protein produced in house with high quality which are covering various species. Among these CD20 proteins, there are 3 Human CD20 protein, 1 Ferret CD20 protein, 1 Cynomolgus CD20 protein. All these CD20 protein are expressed by different host cells. 3 CD20 proteins are expressed by HEK293 Cells , 2 CD20 proteins are expressed by E. coli . These CD20 proteins are produced with different tags, such as His Tag, TrxA Tag.