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