2VGA:
reference: Structure and function of A41, a vaccinia virus chemokine binding protein., Bahar MW, Kenyon JC, Putz MM, Abrescia NG, Pease JE, Wise EL, Stuart DI, Smith GL, Grimes JM, PLoS Pathog. 2008 Jan 18;4(1):e5. PMID: 18208323

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