3TS9:
reference: MDA5 cooperatively forms dimers and ATP-sensitive filaments upon binding double-stranded RNA., Berke IC, Modis Y, EMBO J. 2012 Feb 7. doi: 10.1038/emboj.2012.19. PMID: 22314235

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