1JBT:
reference: Crystal structures of restrictocin-inhibitor complexes with implications for RNA recognition and base flipping., Yang X, Gerczei T, Glover LT, Correll CC, Nat Struct Biol 2001 Nov;8(11):968-73. PMID: 11685244

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