Table 2.

Kinetic parameters for xanthine oxidation in HLS9 system. Constants are expressed as the mean ± SE

PLB μM	Km μM	Vmax nmol/min/mg	Goodness of fit R2	CLint μL/min/mg
0	25.2 ± 2.5	0.033 ± 0.001	0.981	1.3
10	14.7 ± 1.6	0.138 ± 0.003	0.983	9.4
20	15.3 ± 1.1	0.207 ± 0.003	0.993	13.5
40	20.7 ± 3.2	0.303 ± 0.010	0.961	14.6
80	35.2 ± 4.6	0.493 ± 0.016	0.972	14.0