TABLE 3

Signal/noise ratios of enzyme-catalyzed reactions

Blank^{^a}	Measurement
Blank^{^a}	Immediately after Incubation	After the First Measurement^{^b}
	Fold difference between enzyme-catalyzed and blank samples
Blank I	2.4	3.5
Blank II	11.9	17.9

↵a Blank I: as enzyme-catalyzed sample but 2 M NaOH added into samples before initiation of the reactions; blank II: as enzyme-catalyzed sample but in the absence of enzyme.
↵b 2 M NaOH was added into the wells that did not contain it.