Monkey HIF Luciferase Reporter Cell Line-Cos-7 was established by transfection using a pTA-HIF-luciferase reporter vector, which contains 4 repeats of HIF binding sites, a minimal promoter upstream of the firefly luciferase coding region, along with hygromycin expression vector followed by hygromycin selection. The hygromycin resistant clones were subsequently screened for CoCl2-induced luciferase activity.