Table 7.

V_max and K_m of HAPCH23 at various pH levels for NTPDase and NMPase activities

HAP-CH23	Km, mM	Vmax, µmol Pi/mg/min
ATPase (pH 5.8)	9.08	2.21
ATPase (pH 7.5)	N/A	N/A
ATPase (pH 9.0)	1.42	1.74
ADPase (pH 5.8)	2.1	1.91
ADPase (pH 7.5)	8.39	1.38
ADPase (pH 9.0)	0.92	2.37
AMPase (pH 5.8)	2.58	6.77
AMPase (pH 7.5)	2.59	6.89
AMPase (pH 9.0)	N/A	N/A

N/A, not applicable.