Patent ID: 8519095

Claim:
β-polypeptides selected from the group consisting of copolymers having the structures: wherein: R 3 , R 4 , R 5 , and R 6 are each independently selected from the group consisting of hydrogen, substituted or unsubstituted C 1 -C 6 -alkyl, aryl, C 1 -C 6 -alklyaryl, amino, protected-amino, amino-C 1 -C 6 -alkyl, and protected-amino-C 1 -C 6 -alkyl; and at least one of R 3 or R 4 , combined with one of R 5 or R 6 , together with the carbon atoms to which they are attached define a cyclic moiety “A”, wherein “A” is selected from the group consisting of substituted or unsubstituted C 5 -C 12 cycloalkyl, C 5 -C 12 cycloalkenyl, and five- to twelve-membered heterocyclic; and provided that at least two of R 3 , R 4 , R 5 , and R 6 are not simultaneously hydrogen, and in at least one subunit that does not contain a cyclic moiety “A” at least one of R 3 , R 4 , R 5 , and R 6 is selected from the group consisting of amino, protected-amino, amino-C 1 -C 6 -alkyl, and protected-amino-C 1 -C 6 -alkyl.