In certain embodiments, {HEAD ~ X6} is selected from D arginine, D tryptophan, D tyrosine, D proline and {TAIL ~ D valine} 
is selected from
In certain embodiments , { HEAD ~ X6 } is selected from D arginine , D tryptophan , D tyrosine , D proline and { TAIL ~ D valine }
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