In {HEAD ~ other embodiments}, {TAIL ~ X5} is selected from a neutral D amino acid and a positively charged D amino acid 
In { HEAD ~ other embodiments } , { TAIL ~ X5 } is selected from a neutral D amino acid and a positively charged D amino acid
OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH