Hi Saif,

Can you please show us the commands you used in PyMOL to load the data
and generate the map?  (Also, can you send me a copy of the map and
structure?)  Has anyone else seen this problem?

I've looked over a few CCP4 maps in PyMOL, Maestro, and Coot
side-by-side, and at various contours, they all look virtually
identical.  There are slight differences, probably due to algorithmic
deviations, but they look good to me.

In PyMOL:
# mimic Coot
set orthoscopic
set line_width, 5

# get the data
fetch 1cll, async=0
fetch 1cll, type=2fofc, async=0

# create the map; carve 2.5 Ang from the polymer
isomesh 1cll_map,1cll_2fofc, 1.06, poly, carve=2.5

# find example residue
orient i. 78

# color
color magenta, e. N
color tv_yellow, e. C


In Coot:
  * Fetch 1CLL and its map from EDS
  * zoom to residue 78
  * scroll to 1.06 sigma

What do you see here?

Cheers,

-- Jason


On Tue, Oct 26, 2010 at 9:50 AM, S. Saif Hasan <ssha...@purdue.edu> wrote:
> Hello,
>
> I am trying to carve a 2Fo-Fc map around a lipid molecule. The electron 
> density
> at 2 sigma is much smaller in PyMol than in Coot (the map at 1 sigma in PyMol
> is similar to the 2 sigma level map in Coot). I used the "unset
> normalize_ccp4_maps" command but that stops the carved map from being
> generated. What should I do to solve this problem ?
>
> Thank you.
> --
> Saif Hasan
>
>
>
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-- 
Jason Vertrees, PhD
PyMOL Product Manager
Schrodinger, LLC

(e) jason.vertr...@schrodinger.com
(o) +1 (603) 374-7120

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Nokia and AT&T present the 2010 Calling All Innovators-North America contest
Create new apps & games for the Nokia N8 for consumers in  U.S. and Canada
$10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing
Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store 
http://p.sf.net/sfu/nokia-dev2dev
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