hES Cells on Matrigel Alone (IMAGE) University of California - Riverside Caption hESCs grown on Matrigel in defined culture media. The mesh-like structure in the background is Matrigel. Credit Sato lab, UC Riverside 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.