Table 1.

Homing frequency

		% l-arabinose
Expression plasmid*	Experiment	0	0.00002	0.0002	0.002
pMobA	1	97	99	94	56
	2	88	98	92	54
pF-CphI	1	1	0	2	0
	2	0	0	1	0
pBAD	1	2	1	2	0
	2	0	0	2	1

T2 progeny plaques (of 100 picked) that hybridize to the bypass sequence probe MobA25.

*Cells also contain the donor plasmid pT4 (39-60ΔmobA).