There are 3 IL31 protein produced in house with high quality which are covering various species. Among these IL31 proteins, there are 1 Human IL31 protein, 1 Mouse IL31 protein, 1 Cynomolgus IL31 protein. All these IL31 protein are expressed by different host cells. 3 IL31 proteins are expressed by HEK293 Cells . These IL31 proteins are produced with different tags, such as His Tag.