The default rotamer number set:
ARG,LYS,MLY,MLZ,M3L -> nrotamers=4000
GLN,GLU,MET -> nrotamers=2500
ASN,ASP -> nrotamers=1500
PRO,HYP -> nrotamers=500
CYS,SER,THR,VAL -> nrotamers=500
HIS,H1S,H2S,PHE,TYR,TRP,SEP,TPO,PTR,TYS -> nrotamers=1500
LEU,ILE -> nrotamers=1500
ALA,GLY -> nrotamers=1000