[gmx-users] HETATM group "NN 46N FA NO"

[Kai Zhuang]

hi,
I have a pdb file that is a receptor ligand system.
I removed the ligand in Deep View to simulate the ligand by itself,
then i noticed that there's a few dozen lines of HETATM groups under
the name "NN" "46N" "FA" "NO"

any idea what are these?

what force field should i use for these, what parameters?

thanks =-)

-- 
Kai Zhuang
BioMedical Engineering @ University of Toronto
kai dot zhuang at gmail dot com
kai.zhuang at gmail.com
6478314789