Table 3. Comparison of the Kinetic Parameters of SaPrp to Those of Various Cysteine Proteases^a.

	Km (μM)	kcat (s–1)	kcat/Km (M–1 s–1)
SaPrpb	3.4 ± 1.8	0.26 ± 0.05	74,000 ± 38,000
TEV protease44	61.0 ± 10.0	0.16 ± 0.01	2620 ± 460
papain45	0.62 ± 0.09	0.0162 ± 0.000135	26,000c
cathepsin B46	2000 ± 400	0.3 ± 0.05	150c
μ-calpain47	20.54 ± 2.28	0.015 ± 0.002	730 ± 46

^aValues represent means and standard deviations. Abbreviation: TEV, tobacco etch virus.

^bData from this work.

^cStandard deviation not reported.