Table 4. Co-transformation of pRSP9 with pRSP10 or pRSP10b.

Plasmid(s)	Deleted region	Length	Gene affected	Transformation yield (cfu/ng) a , b
pRSP9	1986 - 4680	2695	orf904	Nil
pRSP10	1815 - 1965	151	orf56	Nil
pRSP10b	1815 - 1890	76	orf56	Nil
pRSP9 + pRSP10				Nil
pRSP9 + pRSP10b				8.2 × 10° – 4.9 × 10

^a The transformation experiments were carried out at least three times. The efficiency varied with experiments

^b Negative control (without plasmid DNA) and positive control (pRSP1 or pRSP3) reactions were always included with each set of experiments