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(A) Total number of instances (count and percentage) of water-nucleobase stacking contacts. The distance cutoff between OW and the nucleobase plane (NP) was set at 4.0, 3.5 and 3.0 Å and the corresponding counts and percentages of the nucleobases participating in OW-nucleobase stacking contacts have been reported, (B) Distribution of the vertical distances, i.e. the distances between OW and the nucleobase plane in the recorded stacking interactions, is reported for each nucleobase.
