4AZW:
reference: Structure of WbdD; a bifunctional kinase and methyltransferase that regulates the chain length of the O antigen in Escherichia coli O9a., Hagelueken G, Huang H, Clarke BR, Lebl T, Whitfield C, Naismith JH, Mol Microbiol. 2012 Sep 13. doi: 10.1111/mmi.12014. PMID: 22970759

This OCA Structure page
uses Jmol, developed by the Jmol Development Team (documentation).