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