Additional file 5.

Average dN/dS (Y-axis) obtained by sliding window analysis of the alpha tubulin alignment across classes. Window size = 15, step size = 5. Colours along the x-axis show functional and structural regions: red = alpha helix; blue = beta sheet; green = functional regions (P = interacts with phosphate, ribose = interacts with ribose, others are annotated with their functions). Arrows = codons identified using Bayes empirical Bayes as experiencing divergent selection (position in alignment: 17, 19, 21, 22, 23, 31, 41, 71, 72, 104, 112, 127, 145, 146, 269, 272, 274, 276, 286, 317, 348, 355).

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Eyres et al. BMC Evolutionary Biology 2012 12:148   doi:10.1186/1471-2148-12-148