3DWK:
reference: Identification of dynamic structural motifs involved in peptidoglycan glycosyltransfer., Lovering AL, De Castro L, Strynadka NC, J Mol Biol. 2008 Oct 31;383(1):167-77. Epub 2008 Aug 19. PMID: 18760285

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