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Two-dimensional plots of N73 stacking over the G1:C72 base pair. The quadrants indicated by the intersecting solid lines are defined in the subsection of the text entitled 2D stacking analysis. In the above plots the abscissa is the distance (Å) between the COMs of the six-membered rings of the N73 and G1 bases. The ordinate is defined as the distance between the COM of the five-membered ring of N73 and the COM of the six-membered ring of C72.
