| 4NQW: reference: Structural basis for the redox sensitivity of the Mycobacterium tuberculosis SigK-RskA sigma-anti-sigma complex., Shukla J, Gupta R, Thakur KG, Gokhale R, Gopal B, Acta Crystallogr D Biol Crystallogr. 2014 Apr 1;70(Pt 4):1026-36. doi:, 10.1107/S1399004714000121. Epub 2014 Mar 19. PMID: 24699647 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).