TABLE 1.

Effects of UhpB N-terminal truncations on uhpT-lacZ expression

Fusion	UhpB truncation	β-Galactosidase activity (U) in strain:
		RK1309 (uhp+)		RK1307 (ΔuhpBC)
		−Glc6P	+Glc6P	−Glc6P	+Glc6P
GST		3	850	4	3
GST-Bc	273–500	1	2
	282–500	1	1
	288–500	1	1
	293–500	3	4
GST-Bc R324C	273–500	260	310	390	300
	282–500	>3,700	>3,700	4,520	2,930
	288–500	>3,700	>3,700	5,180	3,240
	293–500	>3,700	>3,700	>3,700	3,990