I converted my protein into CG protein by martinize v2.5.
This is the command I used.
martinize.py -f
dimer69_noW.pdb
-x
dimer69_CG.pdb
-o dimer69_CG.top -nmap CG2FG.map -v -dssp dssp -p Backone -ff elnedyn22p -elastic -cys auto -his
and select HIH as my his residue.
These are the following itp file:
Protein_A.itp
Protein_B.itp
But the number of atoms of HIH residue in itp file are not match the one in coordinate file (.pdb).