1N17:
reference: Structure and dynamics of thioguanine-modified duplex DNA., Somerville L, Krynetski EY, Krynetskaia NF, Beger RD, Zhang W, Marhefka CA, Evans WE, Kriwacki RW, J Biol Chem 2003 Jan 10;278(2):1005-11. Epub 2002 Oct 24. PMID: 12401802

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