Doug,

Rotate transforms atomic coordinates (relative to the precomputed field).
Try using "turn" to move the camera instead.

turn y,180

etc.

Cheers,
Warren


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-----Original Message-----
From: pymol-users-boun...@lists.sourceforge.net
[mailto:pymol-users-boun...@lists.sourceforge.net] On Behalf Of Douglas
Kojetin
Sent: Tuesday, July 22, 2008 9:33 AM
To: pymol-users@lists.sourceforge.net
Subject: [PyMOL] distorted electrostatic surface color with PyMOL/APBS

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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