Fig. 5

Cell type-specific gene expression of previously investigated Volvox genes. The figure shows expression data and references of the best-researched Volvox genes, which are arranged by gene function. These data were extracted from Additional file 4: Table S3, which contains a much more extensive table with expression data, further information, and references of 376 Volvox genes that are at least briefly mentioned in the literature. The length of the expression bar illustrates the fold higher expression of a given gene within the given cell type with respect to the other cell type. Yellow: higher expression in somatic cells; green: higher expression in reproductive cells. The previously published information about expression of these genes is presented in a qualitative, ‘digital’ format because they were either obtained qualitatively anyway or were quantified with a different experimental approach and/or developmental stage, which make comparisons rather difficult. Nonetheless, the numerical value of the previously determined fold difference in expression is indicated, if available