{HEAD ~ Certain aspects} of the present invention relate to linear random amino acid copolymers made of {TAIL ~ amino acid residues} Xaa1, Xaa2, Ala and Lys in a molar ratio which provides a copolymer having the desired biological properties recited herein 
{ HEAD ~ Certain aspects } of the present invention relate to linear random amino acid copolymers made of { TAIL ~ amino acid residues } Xaa1 , Xaa2 , Ala and Lys in a molar ratio which provides a copolymer having the desired biological properties recited herein
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