{HEAD ~ Sensitivity} refers to the ability of the membrane to detect even small amounts of {TAIL ~ bound or attached species} 
{ HEAD ~ Sensitivity } refers to the ability of the membrane to detect even small amounts of { TAIL ~ bound or attached species }
HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL