TABLE 1.

Conjugative transfer of pRAS1 measured by transfer frequencies (proportion of E. coli recipient cells receiving the plasmid) after mating at 22°C for various periods either on a solid surface or in liquid medium

Strain	Transfer frequency on the following type of medium after the indicated mating time (h):								Broth, 24	Transfer frequency ratio for plate mating/ broth mating
	Agar
	1	2	4	6	8	14	24	51
2402	1.2 × 10−3	4.0 × 10−3	3.5 × 10−3	0.13	0.18	0.25	0.48	0.59	1.1 × 10−3	436
1995	1.6 × 10−6	2.5 × 10−6	3.3 × 10−5	1.1 × 10−4	4.1 × 10−4	6.7 × 10−4	6.5 × 10−3	6.8 × 10−2	8.7 × 10−5	75