Superheroes of Cell Stress Response (IMAGE) Duke University Caption Like superheroes of the cell, the protein Rad6 (red), and its partner Uba1 (blue) respond to environmental stress by modifying the protein-producing ribosomes (purple) to stop their maintenance program. This boosts the cell’s ability to fight against stressors. Credit DINACHI OKONKWO, Duke University Usage Restrictions Please Credit Dinachi Okonkwo, Duke University License Original 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.