Table 1.

Catalytic activities of human P450c17 supported by N-27 POR and N-27 POR-G3H6

	17α-Hydroxylase		17,20 Lyase
	N-27 POR	N-27 POR-G3H6	N-27 POR	N-27 POR-G3H6
Km (μm)	1.73 ± 0.154	1.49 ± 0.344	1.92 ± 0.095	1.89 ± 0.341
Vmax (pmol steroid/pmol P450/min)	0.029 ± 0.0007	0.026 ± 0.004	0.041 ± 0.002	0.042 ± 0.005