1R5P:
reference: Anabaena circadian clock proteins KaiA and KaiB reveal a potential common binding site to their partner KaiC., Garces RG, Wu N, Gillon W, Pai EF, EMBO J 2004 Apr 21;23(8):1688-98. Epub 2004 Apr 8. PMID: 15071498

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