There are 11 CD28 protein produced in house with high quality which are covering various species. Among these CD28 proteins, there are 4 Mouse CD28 protein, 2 Rat CD28 protein, 1 Human, Cynomolgus, Rhesus CD28 protein, 3 Human CD28 protein, 1 Cynomolgus CD28 protein. All these CD28 protein are expressed by different host cells. 11 CD28 proteins are expressed by HEK293 Cells . These CD28 proteins are produced with different tags, such as His Tag, hFc Tag, His & hFc Tag, hFc & AVI Tag.