Figure 8.

Joint probability distribution function of the ${\mathrm{C}}_{\alpha }^1-{\mathrm{C}}^1-{\mathrm{N}}^2-{\mathrm{C}}_{\alpha }^2$ (α₁) and ${\mathrm{C}}^1-{\mathrm{N}}^2-{\mathrm{C}}_{\alpha }^2-{\mathrm{C}}^2$ (α₂) torsions for alanine dipeptide. (a) FLEXIBLE simulations, (b) TORSIONAL simulations, and (c) FIXMAN simulations. The bin size for each axis is dα = 18°.