Table 1.

Expression of glyQS-lacZ fusions in vivo

Fusion	Glycine starvation			Cysteine starvation
	+Glycine	−Glycine	Ratio	+Cysteine	−Cysteine	Ratio
GGC-A158	42	130	3.1	34	29	0.85
UGC-A158	58	42	0.72	31	90	2.9
GGC-U158	24	11	0.45	ND	ND	ND
UGC-U158	20	6.0	0.30	14	9.1	0.65
ΔTerm	350	360	1.0	ND	ND	ND

Expression was measured by activity of β-galactosidase, in Miller units (9). ND, not determined; ΔTerm, terminator deleted.