314D:
reference: The structures and relative stabilities of d(G x G) reverse Hoogsteen, d(G x T) reverse wobble, and d(G x C) reverse Watson-Crick base-pairs in DNA crystals., Mooers BH, Eichman BF, Ho PS, J Mol Biol 1997 Jun 27;269(5):796-810. PMID: 9223642

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