Relative stability and energy terms of the conformations explored during the simulations. Black: total potential energy, red = non bonded energy, green: bond angle energy, blue: dihedral energy. All energies are expressed in units of ∈. The extended conformation is taken as the zero-level. Parameters of the dihedral and bond angle terms: A = 2∈, B = 4∈, C = 0:5∈, D = 0, . Representative structures extracted from the simulations are reported: red=α-helix, pink=“broken-helix”, violet=random coil, cyan=β-hairpin and three-fold β-sheet.