1ON7:
reference: The crystal structure of a novel unmethylated form of C-phycocyanin, a possible connector between cores and rods in pycobilisomes., Adir N, Lerner N, J Biol Chem 2003 Jul 11;278(28):25926-32. Epub 2003 Apr 22. PMID: 12709431

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