Table 2.

p-values of pairwise Student's t-tests of the K_n/K_s(0.05 < K_s < 0.5) ratios from Table 1 for different lineages

	Bacteria	S. cerevisiae	A. thaliana	C. elegans	D. melanogaster	Mammalia
Archaea	0.359	0.0706	0.746	0.895	0.708	0.0456
Bacteria		3.65e-10	0.128	0.00538	0.0370	0.0513
S. cerevisiae			1.47e-12	1.07e-7	0.00915	5.74e-28
A. thaliana				0.0141	0.181	7.57e-14
C. elegans					0.789	4.81e-19
D. melanogaster						5.71e-5

Significant p-values (< 0.05) are in bold.