6XHH:
reference: A far-red cyanobacteriochrome lineage specific for verdins., Moreno MV, Rockwell NC, Mora M, Fisher AJ, Lagarias JC, Proc Natl Acad Sci U S A. 2020 Oct 26. pii: 2016047117. doi:, 10.1073/pnas.2016047117. PMID: 33106421

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