>To find such molecules, Sidrauski genetically engineered mammalian cells to emit light any time protein production was shut down. An automated robotic assembly line exposed the cells to more than 100,000 different molecules, one at a time; **also added to the cells was a brew of chemicals toxic enough to trigger a stress response and stop protein synthesis.** Those cells that failed to light up pointed to promising new molecules. The core testing here selected for toxicity first. I'm not getting hopes up. I doubt anything g00gle plans these days.