1C9Z:
reference: Effects of cationic charge on three-dimensional structures of intercalative complexes: structure of a bis-intercalated DNA complex solved by MAD phasing., Shui X, Peek ME, Lipscomb LA, Wilkinson AP, Williams LD, Gao M, Ogata C, Roques BP, Garbay-Jaureguiberry C, Wilkinson AP, Williams LD, Curr Med Chem 2000 Jan;7(1):59-71. PMID: 10637357

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