Cells Express Fluorescent Proteins (IMAGE) University of California - San Diego Caption These are E. coli cells expressing fluorescent fusion proteins of the replisome and division ring in two colors. Credit Jun Lab, UC San Diego Usage Restrictions Must be used in conjunction with Jun Currents Biology paper on cell size. 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.