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. 1998 Feb;180(4):921–931. doi: 10.1128/jb.180.4.921-931.1998

TABLE 2.

Activation of P566–888::lacZ.st by ORF2 provided in trans in E. coli

Constructs (in E. coli) Time point (min) Activity (β-Gal units)
pET28A plus P566–888 (control) 0 69
60 172a
120 185a
pET::ORF2 plus P566–888 0 73
60 380
120 684
a

The increase in β-Gal activity in this case represents the stalling of growth caused by induction of E. coli BIL21 (DE3) with IPTG. β-Gal units are expressed per OD600 of the cell culture. Inhibition of growth causes a slight rise in β-Gal levels.