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