Patent ID: 8268936

Claim:
A triblock copolymer of formula III: wherein: n is 10-2500; m is 10 to 100; m′ is 10 to 100; R x is selected from tyrosine, serine, cysteine, threonine, aspartic acid, glutamic acid, asparagine, and glutamine either singly or in combination; R y is a hydrophobic amino acid side-chain group; R 1 is —Z(CH 2 CH 2 Y) p (CH 2 ) t R 3 , wherein: Z is —O—, —S—, —C≡C—, or —CH 2 —; each Y is independently —O—or —S—; p is 0-10; t is 0-10; and R 3 is an optionally substituted aliphatic group; Q is a valence bond; R 2a is —NHC(O)R 4 ; and R 4 is optionally substituted aliphatic.