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