On 11/30/12 10:41 AM, Velia Minicozzi wrote:
Dear gromacs users,
in the Gromacs manual pages (version 4.5.3 page 211) there are the criteria to
have an Hbond.
r < 0.35 nm, where r is the Donor-Acceptor distance
alpha < 30°, where alpha is the Hydrogen-Donor-Acceptor angle
in the Manual page for g_hbond (version 4.5.3 page 275) it is written
"Hydrogen bonds are determined based on cutoffs for the
angle Acceptor - Donor - Hydrogen (zero is extended) and the distance Hydrogen -
Acceptor"
and even in the file that exits by using the option -dist the xaxis label is
"Hydrogen - Acceptor Distance (nm)"
but I think this is the Donor-Acceptor distance because it seems too big to be
the Hydrogen-Acceptor distance.
Which distance is it?
It depends on what you select. You control whether it is the H-A or D-A
distance using the -da flag. By default, it is a D-A distance. There is small
output bug was reported this morning and there is an open Redmine issue for it.
It is low-priority, but will be fixed sometime in the future.
-Justin
--
========================================
Justin A. Lemkul, Ph.D.
Research Scientist
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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