Antigen: HIF-1(alpha) C-terminal amino acids 809-826 . Host: rabbit . Cross Reactivity: (+) human, mouse, and simian HIF-1(alpha) . Application(s): (+) WB; (-) ICC and IP . HIF-1(alpha) is a transcription factor that accumulates under low-oxygen conditions. Following hypoxic stimulus and cytoplasmic accumulation, HIF-1(alpha) migrates to the nucleus where, with other transcription factors, it drives the production of stress-adaptive proteins. This response is essential for maintenance of normal oxidative physiology, however overexpression in cancer cells promotes tumor survival.