cell density patterns (IMAGE) Keck School of Medicine of USC Caption A circular field of cells shows a gradient of patterns, with green spots decreasing in size as cell density increases. Credit Courtesy of the Morsut Lab/USC Stem Cell Usage Restrictions none 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.