5HPZ:
reference: Fine Tuning of Chlorophyll Spectra by Protein-Induced Ring Deformation., Bednarczyk D, Dym O, Prabahar V, Peleg Y, Pike DH, Noy D, Angew Chem Int Ed Engl. 2016 Apr 21. doi: 10.1002/anie.201512001. PMID: 27098554

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