Table 1.

Nonparametric correlation analysis (Spearman's rank correlation) of codon usage patterns between essential genes and whole genes in Escherichia coli

		Whole_ecoli	Ecoli234_essential
Whole_ecoli	Correlation Coefficient	1.000	.845**
	Sig.(2-tailed)	.	.000
	N	64	64
Ecoli234_essential	Correlation Coefficient	.845**	1.000
	Sig.(2-tailed)	.000	.
	N	64	64

**. Correlation is significant at the 0.01 level (2-tailed)