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Table 2 Pairwise group comparisons of K n /K s values (estimated in model 2c) for all analyzed species (column "all branches") and for species with external branches of the optimal length (column "optimal branches"). In each comparison, the first mentioned group (before slash) has lower K n /K s average value compared to the second group (after slash). The significance of differences of the averages was estimated using the t-test. The number of species from both groups is in the brackets, respectively. See the text for details.

From: Purifying selection in mitochondria, free-living and obligate intracellular proteobacteria

compared groups

all branches

optimal branches

mammals/proteobacteria

P = 0.013 (32/80)

P = 0.032 (28/59)

mammals/obligate proteobacteria

P < 0.001 (32/22)

P < 0.001 (28/15)

mammals/obligate alpha-proteobacteria

P < 0.001 (32/16)

P < 0.001 (28/9)

mammals/free-living proteobacteria

P = 0.068 (32/56)

P = 0.171 (28/44)

glires/primates

P < 0.001 (13/19)

P < 0.001 (12/16)

free-living proteobacteria/obligate proteobacteria

P = 0.018 (56/22)

P = 0.002 (44/15)

free-living gamma-proteobacteria/obligate gama-proteobacteria

P = 0.032 (16/6)

P = 0.059 (13/6)

free-living alpha-proteobacteria/obligate alpha-proteobacteria

P = 0.815 (20/16)

P = 0.163 (17/9)

obligate alpha-proteobacteria/obligate gamma-proteobacteria

P = 0.054 (16/6)

P = 0.165 (9/6)