afsaneh maleki wrote:
Hi all,

i used united the atom force field model for the membrane lipids . to calculate order parameter i used :
g_order  -od   -d
i know united atom force field doesn't have hydrogen atoms in hydrocarbons chains . i want to know gromacs calculates order parameter * Sc-c* or *Sc-d* (Deuterium) ?

Simple geometry.


 in the output is written:  title "Deuterium order parameters"


Is that it? If you've got an empty output, then your index file probably wasn't prepared correctly. There is a how-to on the g_order page on the Gromacs website:

http://www.gromacs.org/Documentation/Gromacs_Utilities/g_order

-Justin

thanks in advance,
Afsaneh


--
========================================

Justin A. Lemkul
Ph.D. Candidate
ICTAS Doctoral Scholar
MILES-IGERT Trainee
Department of Biochemistry
Virginia Tech
Blacksburg, VA
jalemkul[at]vt.edu | (540) 231-9080
http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin

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