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Panel (a): the base-pairs between T–A and C–G revealing both the size and hydrogen-bonding complementarities displayed by these pairs. Panel (b): The wobble base-pairing of T and G (left), and the Hoogsteen base-pairing of T and A (right). Panel (c): wobble base-pairings between thymine and inosine (left), cytosine and inosine (centre), and adenine and inosine (right).
