Re: [Chimera-users] Interpreting field / force direction in Coulombic Surface Coloring

Hi Sumitro, Yes, positive potential favors interaction with negative charges and vice versa. http://plato.cgl.ucsf.edu/pipermail/chimera-users/2012-May/007591.html For example, in this tutorial, Coulombic coloring shows a blue (positive potential) pocket binding a highly negatively charged ligand. http://www.cgl.ucsf.edu/chimera/docs/UsersGuide/tutorials/surfprop.html http://www.cgl.ucsf.edu/chimera/docs/UsersGuide/tutorials/surfprop.html#esp Elaine On May 21, 2012, at 5:12 PM, Sumitro Harjanto wrote:

Hi elaine, so can I say that blue surface (positive potential) is positively charged and has the tendency to attract negative charges?

On May 22, 2012 1:48 AM, "Elaine Meng" wrote: The color shows the value of the potential. If you are using default coloring settings, blue is for positive potential, red for negative potential. Elaine

On May 20, 2012, at 4:39 AM, Sumitro Harjanto wrote:

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Hi elaine, so does blue patch (positive interaction energy) mean positively charged or negatively charged surface?