3S6I:
reference: Analysis of substrate specificity of Schizosaccharomyces pombe Mag1 alkylpurine DNA glycosylase., Adhikary S, Eichman BF, EMBO Rep. 2011 Dec 1;12(12):1286-92. doi: 10.1038/embor.2011.189. PMID: 21960007

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