Figure 1A, 1B, 1C. (IMAGE) Science China Press Caption The proposed catalytic reaction, phylogenetic analysis, and the related gene clusters of tridomain NDP-heptose synthetases. Credit ©Science China Press Usage Restrictions Use with credit. 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.