1VBA:
reference: Structures of poliovirus complexes with anti-viral drugs: implications for viral stability and drug design., Grant RA, Hiremath CN, Filman DJ, Syed R, Andries K, Hogle JM, Curr Biol 1994 Sep 1;4(9):784-97. PMID: 7820548

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