4TQ2:
reference: Insights into the Biosynthesis and Assembly of Cryptophycean Phycobiliproteins., Overkamp KE, Gasper R, Kock K, Herrmann C, Hofmann E, Frankenberg-Dinkel N, J Biol Chem. 2014 Aug 5. pii: jbc.M114.591131. PMID: 25096577

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