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. Author manuscript; available in PMC: 2018 May 30.
Published in final edited form as: J Comput Chem. 2017 Mar 20;38(14):1057–1070. doi: 10.1002/jcc.24782

Figure 1.

Figure 1

Irregular grid point (x, y, z) is projected to surface point (x0, y0, z0). Note that the projection direction is along the gradient direction at (x0, y0, z0), that is, it is perpendicular to the molecular surface. Here, the hollow circles are inner-side grid points in the low dielectric constant region and the solid circles are outer-side grid points in the high dielectric constant region. The dash line represents the molecule surface. [Color figure can be viewed at wileyonlinelibrary.com]