TABLE 4.

lac expression from pHYD275 (E. coli P1.a) in hfq mutants^a

Strain	Mutation	β-Galactosidase sp act at temp:
		30°C	10°C
GJ862	Nil	123	839
GJ2746	hfq-1	24	243
GJ2745	hfq-2	85	750

^aCultures of the indicated strains carrying plasmid pHYD275 were grown in trimethoprim-supplemented K-tryptone medium at 30 or 10°C for β-galactosidase assays. Enzyme specific activity values are reported in Miller units (35).