3IGK:
reference: Diversity in DNA recognition by p53 revealed by crystal structures with Hoogsteen base pairs., Kitayner M, Rozenberg H, Rohs R, Suad O, Rabinovich D, Honig B, Shakked Z, Nat Struct Mol Biol. 2010 Apr;17(4):423-9. Epub 2010 Apr 4. PMID: 20364130

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