Table 2

Michaelis-Menten kinetic parameters in human recombinant isozymes2-a

IsozymeKm [AE] (μM)Vmax (nmol DQHS/min/nmol P450)Clint (L/min/nmol P450)
CYP2B628.1  ± 5.01.36  ± 0.080.05
CYP3A442.0  ± 3.312.64  ± 1.050.30
CYP3A524.9  ± 6.32.75  ± 0.380.11
  • 2-a Arteether at various concentrations was incubated with recombinant isozymes of human cytochrome P450. DQHS production was measured and the Michaelis-Menten parameters were calculated as described in Materials and Methods (mean ± SD,N = 4).