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Table 2 Biochemical parameters determined for Arabidopsis FRK isozymes

From: Identification and biochemical characterization of the fructokinase gene family in Arabidopsis thaliana

Enzyme

Km μM Fructose

Km μM ATP

Fruc substrate inh.

Vmax (μM product *min−1 *mg enzyme−1)

kcat (s−1)

Catalytic efficiency kcat/Km (ATP)

FRK1

470 +/− 77

52 +/− 7.8

−

2.3E + 05

14.2

2.7E + 05

FRK2

370 +/− 91

85 +/− 8.7

+

1.8E + 05

10.3

1.2E + 05

FRK3

480 +/− 99

52 +/− 9.8

+

2.1E + 05

14.3

2.7E + 05

FRK4

230 +/− 56

95 +/− 7.9

+

1.9E + 05

11.1

1.2E + 05

FRK5

320 +/− 89

180 +/− 57

+

7.7E + 04

4.8

2.7E + 04

FRK6

260 +/− 81

160 +/− 21

+

2.1E + 05

12.8

8.0E + 04

FRK7

12 +/− 8.4

280 +/− 94

−

2.6E + 04

1.5

5.4E + 03