Figure 1 (IMAGE) Tohoku University Caption The histidine-rich loop segment is inserted into the cytosolic cavity and coordinated to Zn2+ at the transmembrane metal-binding site for efficient Zn2+ uptake. Credit Han Ba Bui and Kenji Inaba Usage Restrictions Reporters may use freely these materials in news coverage with appropriate credit information. License Original 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.