Wildtype p53 Switch (IMAGE) University of California - San Diego Caption UC San Diego researchers found that the PUMA protein works inside the cell's mitochondria to switch energy production processes and stimulate cancer growth. Credit Xu Lab, UC San Diego Usage Restrictions Must be used in conjunction with Cancer Cell paper on p53 and cancer growth. 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.