. Author manuscript; available in PMC: 2011 Jun 2.

Published in final edited form as: Xenobiotica. 2009 Apr;39(4):312–322. doi: 10.1080/00498250802714915

Table 3.

Kinetic parameters for flavonoid sulfation catalysed by hSULT1A3^a.

Flavonoid	V_max (nmol mg⁻¹ min⁻¹)	K_m (μM)	V_max/K_m (ml mg⁻¹ min⁻¹)	K_i (μM)
Catechin	342 ± 8.2	236 ± 5.6	1.45 ± 0.02	8.0 ± 0.29
Epicatechin	442 ± 9.7	437 ± 10.1	1.01 ± 1.02	9.5 ± 0.21
Hesperetin	303 ± 5.8	179 ± 3.7	1.69 ± 0.02	4.2 ± 0.06
Eriodictyol	269 ± 5.2	193 ± 3.3	1.39 ± 0.03	4.6 ± 0.02

Notes: Data are the means ± standard deviation (SD) of three determinations.

Kinetic parameters were estimated using equation (2) (see the Materials and methods section).