Before revision:  The key features of the sugar CG DNA model are : (1) simulation of sugar repuckering between C2'-endo and C3'-endo by the use of one non-harmonic potential and one three-particle potential, (2) explicit representation of sodium counterions and (3) implicit solvent approach . Effects of solvation and of partial charge screening at small distances are taken into account through the shape of potentials of interactions between charged particles .
After revision:  The key features of the model are (1) simulation of sugar repuckering between C2'-endo and C3'-endo by the use of one non-harmonic potential and one three-particle potential, (2) explicit representation of sodium counterions and (3) implicit solvent approach . Effects of solvation and of partial charge screening at small distances are taken into account through the shape of potentials of interactions between charged particles .