E. coli colonies (IMAGE) RMIT University Caption E. coli colonies lighting up green under UV light confirming they have taken on the fluorescent protein. Credit: RMIT. Credit Credit: RMIT. Usage Restrictions credit 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.