Less Cell Damages in Engineered Yeast (IMAGE) Chalmers University of Technology Caption In regular yeast (the left-hand images), the secretion of proteins is hampered by harmful reactive oxygen species (ROS) generated by the yeast. The lower image shows these as fluorescent areas, which indicate cell damage. In the modified yeast (right) protein production is improved. Credit Mingtao Huang/Chalmers Usage Restrictions for media purpose only 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.