[gmx-users] AFM Pulling Rate

[Bob Johnson]

Hello everyone,
I am using AFM pulling to drag a dna base across the surface of a graphene. I'm
doing this in vaccuum. It seems that the base is pulled at the same rate no
matter what value I specify in afm_rate1. Here is my pull.ppa file:

runtype = afm
group_1 = ssdna-ions
pulldim = N N Y
afm_rate1 = 0.05
afm_k1 = 100
afm_dir1 = 0 0 1

I'm using version 3.3. Does anyone know what's going on?
Thanks,
Bob Johnson