Conformational Analysis of Regular Enantiomeric Sequences

Cylindrical coordinates and symmetries of regular enantiomeric sequences were derived on the basis of eigenvalue-eigenvectors solns. to the Eyring-transformation matrix, and were used to show that the general structure of conformationally equiv. enantiomers was a ring. Helical structures could be formed in the case of quasi-conformational equivalence between the monomeric units. For regular L,D copolypeptides, these helical structures were stabilized by both van der Waals and H bond interactions, and were more stable than the α-helix in the absence of configurational disorder.