2OI9:
reference: How a single T cell receptor recognizes both self and foreign MHC., Colf LA, Bankovich AJ, Hanick NA, Bowerman NA, Jones LL, Kranz DM, Garcia KC, Cell. 2007 Apr 6;129(1):135-46. PMID: 17418792

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