Parameter selection in a Peyrard–Bishop–Dauxois model for DNA dynamics

In this Letter we study possible intervals for some parameters existing in the Peyrard–Bishop–Dauxois (PBD) model for the DNA dynamics. These parameters describe longitudinal and helicoidal interactions between nucleotides and a Morse potential approximating transverse interactions. We also estimate a possible interval for a wave number of a carrier component of a modulated solitonic wave. Finally, we compare our statements with experimental value of solitonic velocity in DNA.