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