Salk Scientists Find a Molecular 'Brake' (IMAGE) Salk Institute Caption By testing over 4,000 genes in human tumors, a Salk team uncovered an enzyme responsible for suppressing a common and deadly lung cancer. From left: Salk researchers Yifeng Xia, Eugene Ke, Narayana Yeddula and Inder Verma. Credit Salk Institute Usage Restrictions with credit and with related coverage 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.