TABLE 2.

FepA globular domain deletion mutants are resistant to colicin B (ColB) and marginally sensitive to colicin D (ColD)

Strain	Genotype	Sensitivitya to
		ColB	ColD
KP1411/pBAD24	aroB fepA−	Rd	UDb
KP1411/pKP515	aroB fepA+	3.9 × 10−5	7.8 × 10−4
KP1411/pKP516	aroB fepAΔ1-152	R	0.2c
KP1411/pKP517	aroB fepAΔ7-152	R	0.2c
KP1411/pKP518	aroB fepAΔ20-152	R	0.2c
KP1411/pKP519	aroB fepAΔ17-150	R	0.2c

^aResults are expressed as the highest dilution at which clearing of the bacterial lawn was observed.

^bUndiluted colicin.

^cAlmost undetectable zones of killing.

^dR, resistant.