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