Table 1.

Enzyme activities of PhoA and LacZ fusion proteins

Fusion	PhoA activity, units	LacZ activity, units
None	0.63  ± 0.026	0.0067  ± 0.015
D95	33  ± 8.3	1.5  ± 0.11
K128	0.93  ± 0.069	3.6  ± 0.37
E161	0.90  ± 0.011	5.4  ± 0.32
D141V-E161	36  ± 3.0	1.8  ± 0.20
K200	0.52  ± 0.045	1.4  ± 0.070
G232	21  ± 2.7	1.6  ± 0.051
E273	21  ± 2.3	1.7  ± 0.046
R322	0.79  ± 0.13	0.45  ± 0.028
E396	0.58  ± 0.027	3.3  ± 0.14
H373V-R383V-E396	2.2  ± 0.020	3.3  ± 0.96