Table 1.

Expression in vivo of the Pcop (Pcop1-Pcop2), Pδ, Pω, and Pɛ promoters fused to lacZ

Genes provided in trans	β-galactosidase activity*
	Pcop	Pδ	Pω	Pɛ
None	329	3561	274	43
δωɛζ	24	26	ND	37
δω	39	54	ND	44
ωɛζ	52	57	8	33
ωɛ	71	118	12	52
ɛ	ND	3484	ND	39
ω	47	50	7	34
Δω†	308	3613	412	ND

Activity specified by the tested promoters in the presence or absence of various products. 

^*The β-galactosidase activity is expressed in Miller units. 

^† The sixth TTA codon of ω gene was converted into a TAA Stop triplet. ND, not done.