Hi All,

I am having some problems with surface display of the output from the APBS plugin distributed with PyMOL (version 1.1r0) using the "color by potential on sol. acc. surf." option. Steps to reproduce the problem:

1. Load in a structure.

2. Perform the APBS calculation (execute "Set grid" and "Run APBS" functions/buttons).

3. Show the electrostatics on the molecular surface under the Visualization tab. I used the following options

Low = -5
High = 5
"solvent accessible surface" = selected
"color by potential on sol. acc. surf." = selected

The initial surface displayed looks OK, and there are no problems if I rotate the molecule using the mouse. However, if I attempt to rotate the molecule using a command such as "rotate y, 180",, the surface coloring is distorted. If I execute "rotate y, 180" again, then rotate by hand, the distortion on the problematic surface-side disappears. However, if I execute "rotate y, 180" once, or some iteration != 360, then rotate the molecule using the mouse, the color distortion is present and will not disappear with subsequent rotate commands.

Thanks in advance for help,

Doug

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