Table 1

Kinetic rate constants for metabolism of XN in rat liver microsomes

SubstrateVmaxKmVmax/KmR2
nmol/min/nmol P450 μM
M10.0072  ± 0.000520.16  ± 8.810.00040.98
M20.0911  ± 0.0077118.97  ± 38.660.00080.99
M30.0035  ± 0.0006246  ± 116.390.000010.97
XN1.46  ± 0.119407.36  ± 79.480.0040.99