1ZPI:
reference: Structures of two minor-groove-binding quinolinium quaternary salts complexed with d(CGCGAATTCGCG)(2) at 1.6 and 1.8 Angstrom resolution., Adams A, Leong C, Denny WA, Guss JM, Acta Crystallogr D Biol Crystallogr. 2005 Oct;61(Pt 10):1348-53. Epub 2005, Sep 28. PMID: 16204886

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