On Tue, Feb 18, 2003, Mahadevan Seetharaman wrote:
>
>
> I have two positively charged N-groups in my DNA 10-mer (duplex). When I
> do "addions unit Na+ 0", only 16 sodium ions are added (understandable,
> since the net charge is -16, 18 phosphates and two N+). I think the system
> should have 18 Na+ ions and 2 Cl- ions instead of 16 Na+ ions. If I want
> to add 18 Na+ ions and 2 Cl- ions to this system, how would I do it, apart
> from doing it manually.
>
You should be able to do the following:
addIons x Na+ 18
addIons x Cl- 2
I don't know if you think this is doing it "manually" or not, but I don't
think there is any simpler approach.
..good luck...dac
--
==================================================================
David A. Case | e-mail: case_at_scripps.edu
Dept. of Molecular Biology, TPC15 | fax: +1-858-784-8896
The Scripps Research Institute | phone: +1-858-784-9768
10550 N. Torrey Pines Rd. | home page:
La Jolla CA 92037 USA | http://www.scripps.edu/case
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Received on Tue Feb 18 2003 - 14:27:20 PST
