Table 2. Kinetic Parameters for Invertase and Trehalase, pH 8.1.

	invertase (yeast)a	trehalase (honeybee)b	β-amylase (sweet potato)c
kcat (s−1)	1.0 × 104	2.6 × 103	1.4 × 103
Km (M)	2.5 × 10−2	6.6 × 10−4	7 × 10−5
kcat/Km (s−1 M−1)	4.2 × 105	3.9 × 106	2 × 107
knon (s−1)	5 × 10−11	3.3 × 10−15	1.9 × 10−15
(kcat/Km)/knon (M−1)	8 × 1015	1.2 × 1021	1022

^aReference (16).

^bReference (17).

^cReference (5).