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Base pairing of OG, OI, OA, Gh and Sp. OG can base pair with C at an anti-anti conformation and with A at a syn-anti conformation. OI can form a similar base pair with the same conformation as OG. OA can only form an anti-anti base pair with T. Gh is proposed to base pair with A and G in a syn-anti conformation. Sp is proposed to base pair with A or G in a syn-anti conformation or potentially with G in an anti-anti conformation (shown).
