p53 Tumour Suppressor Protein (IMAGE) Walter and Eliza Hall Institute Caption Animation still showing the p53 tumour suppressor (yellow) protein binding to DNA (magenta/beige). p53 is a critical protein that determines how cells respond to DNA damage. Credit WEHI, Australia Usage Restrictions With credit 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.