1DA1:
reference: Structural characterisation of the bromouracil.guanine base pair mismatch in a Z-DNA fragment., Brown T, Kneale G, Hunter WN, Kennard O, Nucleic Acids Res 1986 Feb 25;14(4):1801-9. PMID: 3951996

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