Table 2.

Root-mean-squared relative deviations in P3M reaction field forces on DNA 420D with absolute values greater than 1 kcal/mol-Å for the P3M strategy with different cutoff (in grid spacing) compared to the charge view method. Both grid spacing of 0.25 Å and grid spacing of 0.50 Å are computed. Polarization charges are mapped onto the atomic surface.

Cutoff	RMSrD force components (0.50 Å)	RMSrD force components (0.25 Å)
6	2.7×10−3	1.1×10−3
8	1.3×10−3	5.6×10−4
10	9.4×10−4	4.3×10−4
12	6.2×10−4	3.2×10−4
14	4.4×10−4	2.4×10−4
16	3.4×10−4	1.9×10−4