3JQY:
reference: Crystal structure analysis of the polysialic acid specific O-acetyltransferase NeuO., Schulz EC, Bergfeld AK, Ficner R, Muhlenhoff M, PLoS One. 2011 Mar 1;6(3):e17403. PMID: 21390252

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