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Time evolution of minor groove arginine contacts. Distance R of the 14 arginine head groups from the DNA helical axis along the MD trajectories of IN42 (top) and IN21 (bottom). Each row refers to one of the 14 arginines contact points, numbered −7 → +7. Distances are color-coded according to whether the arginine is within the groove (R ≤ 10.25 Å), bound to phosphates (10.25 Å < R ≤ 15 Å) or unbound (R > 15 Å).
