Domain-Swapped Dimer (IMAGE) National Institutes of Natural Sciences Caption Figure 3. Crystal structure of the apo-form of HtaA. Different protomers are shown in different colors. Credit NINS/IMS 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.