Table 2.

Nucleotide composition statistics for a gene population in five S. agalactiae genomes.

Skew	Axis 1	Axis 2
GC skew	r = 0.022, p > 0.05	r = 0.006, p > 0.05
AT skew	r = −0.015, p > 0.05	r = 0.01, p > 0.05
GC12 skew	r = 0.003, p > 0.05	r = 0.13, p > 0.05
AT12 skew	r = 0.016, p > 0.05	r = 0.019, p > 0.05
GC3 skew	r = 0.067 *, p < 0.05	r = 0.056 *, p < 0.05
AT3 skew	r = 0.628 **, p < 0.01	r = 0.555 *, p < 0.01

* Significant difference between them; ** highly significant difference between them.