{TAIL ~ Non} naturally occurring {HEAD ~ amino acid analogs} that can incorporated into the subject copolymers include residues having alkyl, alkenyl, cycloalkyl, heteroalkyl and aryl sidechains 
{ TAIL ~ Non } naturally occurring { HEAD ~ amino acid analogs } that can incorporated into the subject copolymers include residues having alkyl , alkenyl , cycloalkyl , heteroalkyl and aryl sidechains
TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH