VMD-L Mailing List

From: Ajasja Ljubetič (ajasja.ljubetic_at_gmail.com)
Date: Wed Nov 17 2010 - 10:25:55 CST

Try
http://www.uleth.ca/lib/guides/research/display.asp?PageID=35

<http://www.uleth.ca/lib/guides/research/display.asp?PageID=35>I think both
are identical if you include an extra pair of parenthesis
(nucleic) and (resname THY) and (resid 5 7 10) and (not backbone)
(nucleic) and (resname THY) and ((resid 5) or (resid 7) or (resid 10)) and
(not backbone)

Actually if you know the resid (and if this is your only DNA chain) then you
don't need the resname.
Regards,
Ajasja

On Wed, Nov 17, 2010 at 15:49, Alex Liu <liu.alex77_at_yahoo.com> wrote:

>
>
> Hi everyone,
>
> I am trying to understand the atomselection in vmd. I want to select
> thymine residues 5 and 7 and 10 without considering backbones. I am not sure
> which one of these is true?
>
> (nucleic) and (resname THY) and (resid 5 7 10) and (not backbone)
> (nucleic) and (resname THY) and (resid 5) or (resid 7) or (resid 10) and
> (not backbone)
>
> In fact, I am confused with the meaning of :"and" and "or". I would
> appreciate if any one could tell me what these two do especially the
> second one.
> Finally, if any one could tell me how to get more information about the
> atom selection using :"and" and "or" it would be great because in the manual
> I did not find much.
>
> Thanks for your idea.
> Alex
>
>
>
>
>