3UBM:
reference: Formyl-coenzyme A (CoA): Oxalate CoA-transferase from the acidophile Acetobacter aceti has a distinctive electrostatic surface and inherent acid stability., Mullins EA, Starks CM, Francois JA, Sael L, Kihara D, Kappock TJ, Protein Sci. 2012 Feb 28. doi: 10.1002/pro.2054. PMID: 22374910

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