Before revision:  In our DNA model, a single nucleotide  is represented by a single interaction site , and complementary sites can hybridize reversibly . Along with the dynamic hybridization bonds, angular and dihedral bonds are dynamically introduced and removed to model the collective properties of double helix structure on the DNA zippering dynamics.
After revision:  In our DNA model, a single nucleotide is represented by a single interaction site . Complementary sites can reversibly hybridize and dehybridize during a simulation. This bond dynamics induces a dynamics of the angular and dihedral bonds are dynamically introduced and removed to model the collective properties of double helix structure on the DNA zippering dynamics.