1JB8:
reference: Crystal structure of an RNA.DNA hybrid reveals intermolecular intercalation: dimer formation by base-pair swapping., Han GW, Kopka ML, Langs D, Sawaya MR, Dickerson RE, Proc Natl Acad Sci U S A 2003 Aug 5;100(16):9214-9. Epub 2003 Jul 18. PMID: 12872000

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