Resolution:
## Figure 6.
Statistical analysis of adenine substitutions. Frequencies of the four bases were determined for each adenine-corresponding position
in the VRs of our data set. Bars represent the mean values of these frequencies over
the total results set (A) or the Bacteroides cluster 1 (B). Error bars are +/− standard deviation. The frequencies of the three nucleotides
C, T and G in (A) were significantly different from each other (p < 0.001, χ^{2} test).
Schillinger |