Fluorescent Bacteria (IMAGE) Instituto Gulbenkian de Ciencia Caption These are fluorescent yellow and blue bacteria (E. coli) that either produce or scavenge AI-2 signal. Credit Ozhan Ozkaya (IGC) Usage Restrictions Credits to Ozhan Ozkaya (IGC) 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.