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In the present density functional theory study, we have compared intrinsic properties of non-natural nucleobases (acA, acG, acC, and acT nucleobases) such as proton affinities, gas phase acidities, tautomerization, and hydrogen-bonding properties with those in normal Watson–Crick nucleobases (A, G, C, T nucleobases). The hydrogen-bonding interactions in non-natural and Watson–Crick base pairs were...
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