In {TAIL ~ other embodiments}, {HEAD ~ X6} is selected from a positively charged D amino acid, an aromatic D amino acid and a neutral D amino acid 
In
In { TAIL ~ other embodiments } , { HEAD ~ X6 } is selected from a positively charged D amino acid , an aromatic D amino acid and a neutral D amino acid
REL TAIL TAIL TAIL TAIL TAIL TAIL OTH 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 OTH