Table 2.

Plasmid copy number determinations

Plasmid	Gene assayed	Input genomic DNA (pg)	Gene copy no.*	Average plasmid copy no. ± SD
pETEC666	eltA	100	19	16 ± 3
		10	17
		1	16
	sta1	100	16
		10	16
		1	14
pETEC948	sta2	100	14	13 ± 4
		10	14
		1	12

^*Average of 2–3 assays per DNA concentration.