The random copolymers have {HEAD ~ amino acids alanine}, lysine and one or more of {TAIL ~ the hydrophobic amino acids valine}, phenylalanine, tryptophan and tyrosine 
The random copolymers have { HEAD ~ amino acids alanine } , lysine and one or more of { TAIL ~ the hydrophobic amino acids valine } , phenylalanine , tryptophan and tyrosine
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH