In certain embodiments, {HEAD ~ X5} is selected from D leucine, D isoleucine, D alanine, D proline and {TAIL ~ D lysine} 
In certain embodiments , { HEAD ~ X5 } is selected from D leucine , D isoleucine , D alanine , D proline and { TAIL ~ D lysine }
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL REL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL