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