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