In certain embodiments, {HEAD ~ X3} is selected from {TAIL ~ D arginine}, D lysine and D histidine 
is selected from
In certain embodiments , { HEAD ~ X3 } is selected from { TAIL ~ D arginine } , D lysine and D histidine
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH