Cryo-EM graphene grids (IMAGE) Princeton University Caption Princeton University Professor Nieng Yan's lab has developed technical improvements allowing for fabrication of cryo-EM graphene grids, which improve the density of proteins being imaged. Credit Image courtesy Yan Lab, Princeton University Usage Restrictions Editorial Use Only 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.