Hela/STAT5 Reporter (GFP) cells are derived from the human cervix adenocarcinoma Hela cell line by stably integration of a STAT5 GFP reporter construct. The Hela cell line has been widely used in cancer research and drug development. Hela/STAT5 Reporter (GFP) cells stably express GFP under the control of the STAT5 response elements, can be used for monitoring the activity of STAT5 signaling pathway.