Effect of organism lifestyle on functional divergence.

Associations between lifestyle and enrichment for functional divergence: the numbers of genomes in each category are given in the form Lifestyle/Comparison. Significance was assessed with Yates-corrected chi-squared tests, or Fisher tests when the expected count was lower than 5 for any one cell in the contingency table. Significance codes: N.S. = P>0.05; * = P<0.05, ** = P<0.01, *** = P<0.001. If an association was significant, “+” or “−” denote the direction of the shift associated with the lifestyle being tested. For instance, interactors are significantly impoverished (−) compared to free-living bacteria.