{TAIL ~ Such assays} may be used to detect the presence of or to quantitate the amount of the organic compound in a complex and varied immunological background such as a sample of {HEAD ~ a biomass material} 
{ TAIL ~ Such assays } may be used to detect the presence of or to quantitate the amount of the organic compound in a complex and varied immunological background such as a sample of { HEAD ~ a biomass material }
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD