Green Fluorescent Protein (IMAGE) University of Pennsylvania Caption This is a 96-well plate containing the bacteria expressing different synonymous versions of the GFP gene. Credit Josh Plotkin and the University of Pennsylvania Usage Restrictions None 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.