1CYZ:
reference: Imidazole-imidazole pair as a minor groove recognition motif for T:G mismatched base pairs., Yang XL, Hubbard RB, Lee M, Tao ZF, Sugiyama H, Wang AH, Nucleic Acids Res 1999 Nov 1;27(21):4183-90. PMID: 10518609

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