There are 6 IL21 protein produced in house with high quality which are covering various species. Among these IL21 proteins, there are 2 Rat IL21 protein, 2 Human IL21 protein, 1 Mouse IL21 protein, 1 Canine IL21 protein. All these IL21 protein are expressed by different host cells. 1 IL21 proteins are expressed by Baculovirus-Insect Cells , 5 IL21 proteins are expressed by E. coli . These IL21 proteins are produced with different tags, such as His Tag.