{HEAD ~ Detection} of {TAIL ~ an increase} in fluorescent signal indicates the presence of the enzyme in the sample 
of
{ HEAD ~ Detection } of { TAIL ~ an increase } in fluorescent signal indicates the presence of the enzyme in the sample
HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH