Capaldi Lab (IMAGE) University of Arizona Caption From left: Senior Research Scientist Xiangxia Luo and Andrew Capaldi, associate professor of molecular and cellular biology, examine cell lines they built that allow them to turn the TOR and PKA pathways on and off using drugs. Credit Michele Vaughan Usage Restrictions This visual may only be used in conjunction with reporting on or posting of this news release. Credit must be given as indicated. 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.