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