There are 3 IL28B protein produced in house with high quality which are covering various species. Among these IL28B proteins, there are 2 Human IL28B protein, 1 Mouse IL28B protein. All these IL28B protein are expressed by different host cells. 2 IL28B proteins are expressed by HEK293 Cells , 1 IL28B proteins are expressed by Yeast . These IL28B proteins are produced with different tags, such as His Tag.