Interaction of Hsp90, P23 and ATP (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.