ZnT8 Protein (IMAGE) Johns Hopkins Medicine Caption An illustration of the high-risk (left) and low-risk (right) versions of the ZnT8 protein transporting zinc ions (purple spheres) across a cell membrane, where it binds with insulin (green and yellow). The letters show the difference in the DNA code that produces the variation in proteins. Credit Chengfeng Merriman and Dax Fu/Johns Hopkins Medicine 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.