| 3PCN: reference: Crystal structure and resonance Raman studies of protocatechuate 3,4-dioxygenase complexed with 3,4-dihydroxyphenylacetate., Elgren TE, Orville AM, Kelly KA, Lipscomb JD, Ohlendorf DH, Que L Jr, Biochemistry 1997 Sep 23;36(38):11504-13. PMID: 9298971 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).