2PR5:
reference: Structural Basis for Light-dependent Signaling in the Dimeric LOV Domain of the Photosensor YtvA., Moglich A, Moffat K, J Mol Biol. 2007 Oct 12;373(1):112-26. Epub 2007 Aug 2. PMID: 17764689

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