From: An effective all-atom potential for proteins
Residue
Set of atoms (A I )
Arg
N ϵ , C ζ , Nη1, Nη2
Lys
1H ζ , 2H ζ , 3H ζ
Asp
Oδ1, Oδ2
Glu
Oϵ1, Oϵ2