{HEAD ~ Detection} of organic compound in the sample occurs through binding to {TAIL ~ a specific antibody} 
occurs through binding to
{ HEAD ~ Detection } of organic compound in the sample occurs through binding to { TAIL ~ a specific antibody }
HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL