TABLE 2.

Linear regression of mean substitution count (M) vs. index of dispersion [R(t)] for yeast, Drosophila, and mammalian proteins

	Coefficient	95% C.I.	t-value	Pr(>|t|)
Yeast
Intercept	1.1891	0.7662, 1.6119	5.5142	3.9e-8
M	0.0353	−0.0085, 0.0791	1.5811	0.1140
M2	−0.0000	−0.0009, 0.0009	−0.0225	0.9820
Drosophila
Intercept	1.6117	1.3468, 1.8766	11.9272	<1.0e-15
M	0.0858	0.0600, 0.1117	6.5076	8.4e-11
M2	−0.0005	−0.0010, 0.0000	−1.7941	0.0729
Mammalian
Intercept	1.1059	0.6151, 1.5966	4.4169	<1.0e-15
M	0.4453	0.3852, 0.5054	14.5237	<1.0e-15
M2	−0.0049	−0.0063, −0.0035	−6.8337	8.9e-12