TABLE 3.

Transposition of Tn5520 in E. coli

Donor	Transposition frequency (mean ± SE)a
DW1030(pOX38::Kan, pTJ20)b	(1.1 ± 0.2) × 10−5
DW1030(pOX38::Kan, pBR322)c	(7.7 ± 1.9) × 10−8
pTJ22.23d	(1.9 ± 1.2) × 10−7
pTJ22.26d	(1.2 ± 0.05) × 10−7
pTJ22.20d	(1.2 ± 0.3) × 10−7
pTJ22.25e	(7.5 ± 2.3) × 10−5
pTJ22.10e	(2.9 ± 0.9) × 10−5
pTJ22.36e	(1.9 ± 0.6) × 10−5
pTJ22.24e	(5.1 ± 2.9) × 10−5
pTJ23f	(7.7 ± 1.9) × 10−8

^aExperiments were performed at least in triplicate. 

^bPositive control. 

^cNegative control. 

^dMutant with Tn1000 insertion in bipH. 

^eMutant with Tn1000 insertion outside bipH. 

^fDeletion of Tn5520 B end.