Transcription Factorp 63 (IMAGE) University of Pennsylvania School of Medicine Caption The transcription factor p63 establishes epithelial enhancers at genes crucial to epithelial cell identity. Credit Enrique Lin-Shiao, Penn Medicine Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.