Hi Lina,

1] do I need generate the map from ccp4
>
>  (I have already installed the ccp4i, but seems not easy to know how
> to get the map)
>

The CCP4 file is a map. Once the map is loaded into PyMOL you can choose how
you want to represent the data: isomesh, isosurface, slice, gradient, or the
new volumes. To make a new representation for the map choose one of those
from the "A" (Action) button.



> 2] For small molecular (ligand), the ccp4 is the best way to obtain
> its  electron density map?
>

PyMOL natively reads these maps, so you don't need ccp4i or any special
plugins.

Cheers,

-- Jason


-- 
Jason Vertrees, PhD
PyMOL Product Manager
Schrodinger, LLC

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