Structure of Mature Flaviviruses (IMAGE) Proceedings of the National Academy of Sciences Caption Structure of mature flaviviruses. Surface view of mature ZIKV showing the E proteins arranged in a herringbone pattern. The three E protomers within one icosahedral asymmetric unit are shown in blue, red and green. Three E dimers form a raft. Credit Image courtesy of Feng Long. 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.