[gmx-users] distance restraint

[xiao]

Dear Gromacs users,


I am running a MD with distance restraint between two atoms. Firstly, i put the following text in the topology file: 
[distance_restraints]
230 1683 1 0 1 0.25 0.27 0.29 50
This is to restraint the distance between the two atoms 230 and 1683 around 0.26 nm. I am not sure the units used by Gromacs, and i guess it is nanometer, can anyone tell me whether i am right or not?


Secondly, i added the following text in the .mdp file:
disre_fc=100
disre=simple


This is what i did, and i am not sure whether i skip something important. I really appreciate it to get any information from you.


Best regards


Fugui