2OQO:
reference: Crystal structure of a peptidoglycan glycosyltransferase suggests a model for processive glycan chain synthesis., Yuan Y, Barrett D, Zhang Y, Kahne D, Sliz P, Walker S, Proc Natl Acad Sci U S A. 2007 Mar 27;104(13):5348-53. Epub 2007 Mar 8. PMID: 17360321

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