[PyMOL] troubles to display delphi surface in Pymol

[elena.papaleo <ele...@un...>]

Hi!!!
I am trying to display an electrostatic potential surface=20
calculated by Delphi in Pymol.

I used the following instruction:
> load delphi.phi
> ramp_new map, delphi
> load structure.pdb
> set surface_color map, structure
> show surface

I adopted this procedure in the past on some protein=20
systems and it worked well but now when I use it on other=20
proteins structure it gave me troubles. The problems is=20
that the surface is completely blue (positive) whereas=20
using other visualization programs it appears completely=20
different.
My Pymol version is 0.98, and I also tried a different=20
scale  for the color surface but the results are always=20
the same.

Do you have some suggestions?
Thanks a lot in advance

Elena