TABLE 2.

Comparison of steady-state levels of wild-type and mutant glpD leader-lacZ mRNA in E. coli MC4100D1 and MC4100D2 at different temperatures^a

Plasmid	MC4100D1/MC4100D2 ratio
	32°C	37°C	42°C
None	1	1.0	1.1
pHP13	1	1.0	1.1
pPHis1	1	1.1	0.8

^aRelative amounts of mRNA were calculated from Fig. 3.