A biosensor 18 in which {HEAD ~ the first second receptor moieties} are Fab fragments which recognize {TAIL ~ different antigenic determinants} 
A biosensor 18 in which { HEAD ~ the first second receptor moieties } are Fab fragments which recognize { TAIL ~ different antigenic determinants }
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL