2QKE:
reference: Structural model of the circadian clock KaiB-KaiC complex and mechanism for modulation of KaiC phosphorylation., Pattanayek R, Williams DR, Pattanayek S, Mori T, Johnson CH, Stewart PL, Egli M, EMBO J. 2008 May 22;. PMID: 18497745

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