1KBY:
reference: The structure of the heterodimer reaction center from Rhodobacter sphaeroides at 2.55 a resolution., Camara-Artigas A, Magee C, Goetsch A, Allen JP, Photosynth Res. 2002;74(1):87-93. PMID: 16228547

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