1G3X:
reference: Intercalation of an acridine-peptide drug in an AA/TT base step in the crystal structure of [d(CGCGAATTCGCG)](2) with six duplexes and seven Mg(2+) ions in the asymmetric unit., Malinina L, Soler-Lopez M, Aymami J, Subirana JA, Biochemistry 2002 Jul 30;41(30):9341-8. PMID: 12135355

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