Figure 3

Conservation of transcript abundance between various species. (a) Scatter plot representing the abundance of the D. discoideum transcripts (x-axis, log₁₀ scale) compared to their D. purpureum orthologs (y-axis, log₁₀ scale). Each point represents the sum of read counts over the seven developmental time points. We divided the genes into three groups and indicated enriched Gene Ontology terms. Low abundance, <1,000 reads (green); intermediate abundance, 1,000 to 10,000 reads (blue); and high abundance, >10,000 reads (red). (b) We calculated the median gene abundance rank (y-axis, percentile) within five functional categories (indicated by the color code) in amoebae (D. discoideum and D. purpureum), mice (M. musculus), and yeast (S. cerevisiae), as indicated (x-axis). The asterisk indicates that only 21 genes represent this category in D. purpureum whereas the other species have >100 genes.