Table 3.

V_max and K_m of the mixture of CD39CH23 and CD73CH23 at various pH levels for NTPDase and NMPase activities

CD39CH23 + CD73CH23	Km, mM	Vmax, µmol Pi/nmol/min
ATPase (pH 7.5)	0.062	1.97
ADPase (pH 7.5)	0.074	1.82
AMPase (pH 7.5)	0.51	3.40
ATPase (pH 5.8)	0.13	1.62
ADPase (pH 5.8)	0.04	0.44
AMPase (pH 5.8)	0.52	3.46
ATPase (pH 9.0)	0.164	4.42
ADPase (pH 9.0)	0.098	2.40
AMPase (pH 9.0)	0.69	3.92