Sebastian Waltz wrote:
Hi all,

I constrained in the .top file some bonds
[ constraints ]
;ai     aj      type    distance
   40    41     2       0.1430
   47    48     2       0.1430
   54    55     2       0.1430
   61    62     2       0.1430

After running the simulation for 5ns I get a bond length of
0.23....(out of the .trr file). So I am not sure whats
going wrong. This bonds are C O double bonds which have an
equilibrium bond length of 0.143nm.


Since these are actual chemical bonds, why are you using constraint type 2 instead of 1? See the manual, section 5.4 regarding the proper function type.

-Justin

Thanks a lot

Sebastian

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

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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