(IMAGE) Technical University of Munich (TUM) Caption Without P23 the heat shock enzyme effectively runs on idle. When P23 joins the game, it is like shifting into gear. Credit Bjoern Hellenkamp / TUM 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.