| 4J1Y: reference: A molecular switch governs the interaction between human complement protease C1s and its substrate, complement C4., Perry AJ, Wijeyewickrema LC, Wilmann PG, Gunzburg MJ, D'Andrea L, Irving JA, Pang SS, Duncan RC, Wilce JA, Whisstock JC, Pike RN, J Biol Chem. 2013 Apr 16. PMID: 23592783 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).