[gmx-users] Freeze a group of atoms in gromacs

[ARNAB MUKHERJEE]

Hello,

I am simulating a course grained DNA with counterions. I want to know if
there is a way in gromacs to freeze all the degrees of freedom of DNA, so
as to completely restrict its motion. So, the DNA in my system will be
fixed while the ions will be moving. How can I achieve this in gromacs?

Thanks a lot,

Regards,

Arnab Mukherjee