6BWC:
reference: Molecular Architectures of Pen and Pal: Key Enzymes Required for CMP-Pseudaminic Acid Biosynthesis in Bacillus thuringiensis., Delvaux NA, Thoden JB, Holden HM, Protein Sci. 2017 Dec 20. doi: 10.1002/pro.3368. PMID: 29266550

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