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. Author manuscript; available in PMC: 2016 Feb 5.
Published in final edited form as: J Comput Chem. 2014 Nov 27;36(4):235–243. doi: 10.1002/jcc.23791

Figure 6.

Figure 6

Two views of the electrostatic potential (ϕ) surface map of the rRNA (PDBid: 1HC8) obtained with the nonlinear Poisson-Boltzmann equation and a finest grid spacing of 0.1 Å. The ϕ scale is as follows: (G,B,W,R,Y) = (5.5,2.75,0, −2.75, −5.5) kT/e. The Mg2+ binding sites are displayed as gray spheres. Panel (a) highlights the two Mg2+-binding sites (MG1163 and MG1167) with the largest negative ϕ’s.