{HEAD ~ Nanostructures} associated with cells respond to {TAIL ~ changes} in membrane potential, and can be easily monitored 
{ HEAD ~ Nanostructures } associated with cells respond to { TAIL ~ changes } in membrane potential , and can be easily monitored
HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH