Hi Martin,

To select all ASPs and GLUs just type,

select resn GLU+ASP

or

select resn GLU or resn ASP

or, if you need parentheses,

select ((resn GLU) or (resn ASP))


Maybe this will help:

# fetch a test protein

fetch 1rsy, async=0

# color all ASPs and GLUs red

color tv_red, (resn ASP or resn GLU)


While the boolean 'and' works, the following will fail to select and
color any atoms:

color tv_red, (resn ASP and resn GLU)

because there will be no _single atom_ in both an ASP and a GLU.  The
boolean 'and' in "(resn ASP and resn GLU)" requests an atom that is in
any ASP _and_ in any GLU--which is impossible.

Cheers,

-- Jason



On Tue, Mar 1, 2011 at 7:44 AM, Martin Hediger <ma....@bluewin.ch> wrote:
> Dear all
> What is the selection syntax to select all GLU and ASP residues within an
> object?
>
> I'm trying it the way its written on the wiki:
>
> remove resn hoh    # remove water
> h_add              # add hydrogens
>
> as surface
> color grey90
>
> color slate, resn lys       # lysines in light blue
> color paleyellow, resn cys  # cysteines in light yellow
> color tv_red, (resn asp or(resn glu))  # aspartic and glutamic acid in light
> red
>
> but, the selection kind of does not work for me (I'm assuming the operator
> for the logical AND is 'and').
> What is it that I need to do differently?
>
> Kind regards
> Martin
>
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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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