VladR 2 (IMAGE) King Abdullah University of Science & Technology (KAUST) Caption When the gel is stained with the conjugate and illuminated with UV radiation, the His-tagged proteins can be seen with the naked eye. Credit © 2020 KAUST 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.