Random three and four amino acid copolymers having {TAIL ~ lengths} of {HEAD ~ 14 , 35 and 50 amino acid residues} are provided 
Random three and four amino acid copolymers having { TAIL ~ lengths } of { HEAD ~ 14 , 35 and 50 amino acid residues } are provided
OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH