. 2003 Mar 15;31(6):1683–1692. doi: 10.1093/nar/gkg258

Table 2. Kinetic parameters of DHPases from various organisms.

Enzyme	Substrate	K_m (µM)	V_max (µM min^–1 mg^–1)	V_max/K_m (min^–1 mg^–1)
S.kluyveri	DHU	710 ± 90	1340 ± 85	1.88
	DHT	490 ± 80	700 ± 30	1.43
	NCBA^a	10 000 ± 250	160 ± 20	0.016
D.discoideum	DHU	400 ± 50	550 ± 20	1.38
	DHT	37 ± 5	176 ± 6	4.8
	NCBA^a	2400 ± 250	76 ± 2	0.032
Calf liver	DHU	25	3670	146.8
	DHT	85	8341	98.1
	NCBA^b	4100	1500	0.36

The data for the calf liver DHPase are taken from Jahnke et al. (12).

^apH 6.5.

^bpH 5.5.