E1 Protein on Cell Surface (IMAGE) Brandeis University Caption This is an E1 protein, on the surface of a mammalian cell, illuminated with a teal fluorescent protein and viewed through a laser mounted total internal reflection microscope. Credit Leigh Plant 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.