Limb Enhancers (IMAGE) DOE/Lawrence Berkeley National Laboratory Caption Cell activity patterns of two gene enhancers (red and green cells). Cells in which both enhancers are active appear yellow. Credit (Credit: Marco Osterwalder). Usage Restrictions Editorial Use 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.