Mol. dynamics simulation studies on the folding of beta-peptides H-beta3-HVal-beta3-HAla-beta3-HLeu-(S,S)-beta3-HAla(alphaMe)-beta3-HVal-beta3-HAla-beta3-HLeu-OH and H-beta2-HVal-beta3-HAla-beta2-HLeu-beta3-HVal-beta2-HAla-beta3-HLeu-OH were carried out. Despite the small differences in sequence between the two peptides studied, the simulations correctly predict a left-handed 31-helical fold for the beta-heptapeptide and a right-handed helical fold for the beta-hexapeptide.