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