Table 2. Correlation coefficients of plasmid DNA recombination frequencies with the genomic DNA recombination frequencies and with the main physico-chemical parameters of the seventeen 2 kb long DNA fragments targeted in this study.

	Recombination frequencies of genomic DNA	Distance of Origin	GC%	GC skew	DNA helical stability
Pearson correlation	0.691a	0.031	0.021	0.062	−0.024
P-values	0.003	0.890	0.936	0.813	0.926

^aindicated that the correlation is significant (p<0.01).