The structures of the dipeptides with the most significant statistical weight in the partition function at the global minimum of the torsional PMF for the (A) Ac-AlaL-AlaL-NHMe (λ(1) = −60°, λ(2) = 60°, λ(3) = −60°, λ(4) = 60°), (B) Ac-AlaL-AlaD-NHMe (λ(1) = −60°, λ(2) = 60°, λ(3) = 60°, λ(4) = −60°), (C) Ac-AlaL-AlaL-Pyr (λ(1) = −60°, λ(2) = 60°, λ(3) = −135°, λ(4) = 135°) systems.