3DBJ:
reference: Allophycocyanin trimer stability and functionality are primarily due to polar enhanced hydrophobicity of the phycocyanobilin binding pocket., McGregor A, Klartag M, David L, Adir N, J Mol Biol. 2008 Dec 12;384(2):406-21. Epub 2008 Sep 16. PMID: 18823993

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