Patent ID: 8143214

Claim:
A protein-polymer conjugate of formula I: wherein each of R 1 , R 2 , R 3 , R 4 , and R 5 independently, is H, C 1-5 alkyl, C 2-5 alkenyl, C 2-5 alkynyl, aryl, heteroaryl, C 3-8 cycloalkyl, or C 3-8 heterocycloalkyl; each of A 1 and A 2 , independently, is a polymer; each of G 1 , G 2 , and G 3 , independently, is a bond or a linking functional group; P is interferon-α, human growth hormone, or erythropoietin; m is 0 or an integer of 1-10; and n is an integer of 1-10.