There are 2 Chk1 protein produced in house with high quality which are covering various species. Among these Chk1 proteins, there are 1 Human Chk1 protein, 1 Mouse Chk1 protein. All these Chk1 protein are expressed by different host cells. 2 Chk1 proteins are expressed by Baculovirus-Insect Cells . These Chk1 proteins are produced with different tags, such as GST Tag, His & GST Tag.