| 3I6S: reference: Structural basis for Ca2+-independence and activation by homodimerization of tomato subtilase 3., Ottmann C, Rose R, Huttenlocher F, Cedzich A, Hauske P, Kaiser M, Huber R, Schaller A, Proc Natl Acad Sci U S A. 2009 Oct 6;106(40):17223-8. Epub 2009 Sep 23. PMID: 19805099 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).