Fig. 4

The abundance of proteins encoded by genes that have been lost, transferred to the nucleus, or retained in the organellar genome. A The abundance of proteins in the cyanobacterium Microcystis aeruginosa categorized according to whether their encoding genes have been lost, transferred to the Arabidopsis thaliana nuclear genome, or retained in the Arabidopsis thaliana chloroplast genome. B The abundance of proteins in the alphaproteobacterium Bartonella henselae categorized according to whether their encoding genes have been lost, transferred to the Arabidopsis thaliana nuclear genome, or retained in the Arabidopsis thaliana mitochondrial genome. C, D As in B but for Saccharomyces cerevisiae and Homo sapiens, respectively. E As in A but for all plastid genomes on NCBI. F As in B but for all mitochondrial genomes on NCBI. L, lost; T, transferred to the nuclear genome; R, retained in the organellar genome. Letters above the boxplots indicate whether there were significant differences between the means of different groups (p < 0.05) in the results of a one-way ANOVA with Tukey test for multiple comparisons