. 2009 Feb 23;18(5):881–892. doi: 10.1002/pro.95

Table I.

Summary of Kinetic Data for PurT, PurK, and the Hybrid Enzyme K_ABT_C

Enzyme	K_m (GAR) (μM)	K_m (AIR) (μM)	K_m (ATP) (μM)	K_m (HCO₂⁻) (μM)	K_m (HCO₃⁻) (μM)	k_cat (s⁻¹)	k_cat/K_m (GAR) (μM⁻¹ s⁻¹)	k_cat/K_m (AIR) (μM⁻¹ s⁻¹)	k_cat/K_m (HCO₂⁻) (μM⁻¹ s⁻¹)	k_cat/K_m (HCO₃⁻) (μM⁻¹ s⁻¹)
PurT^a	10.1 ± 0.5	ND^b	45 ± 12	319 ± 15	ND	37.6 ± 0.8	38	ND	0.84	0.12
PurT^c	36 ± 5	ND	85 ± 14	1700 ± 310	ND	2.1 ± 0.1	0.058	ND	0.025	1.2×10⁻³
K_ABT_C^c	ND	ND	1400 ± 300	ND	ND	(9 ± 0.9)×10⁻³	ND	ND	6.4×10⁻⁶	ND
PurK^d	ND	26	90	ND	ND	52	ND	2.0	0.58	ND
PurK^c	ND	232 ± 20	ND	ND	ND	26.4 ± 1.5	ND	0.11	ND	ND

Adapted from Ref.24.

ND indicates the value was not determined.

Fused with an N-terminal MBP domain.

Adapted from Ref.34.