Embryonic Rat Kidney Cells (IMAGE) University of California - San Diego Caption In this micrograph, embryonic rat kidney cell aggregates are colored red. Differentiated human cells incorporated into these aggregates are colored green. Blue marks DNA in all cells. Credit UC San Diego Health 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.