Fig. 3
From: The economics of organellar gene loss and endosymbiotic gene transfer
The impact of protein turnover on the energetic favorability of organellar gene retention. A The number of genes in the alphaproteobacterial (mitochondrial) genome for which it is more energetically favorable to the cell for the gene to be retained in the organellar genome. C As in B but for the cyanobacterial (chloroplast) genome. All lines assume a per-residue protein import cost of 2 ATP per amino acid. Green lines assume that protein turnover is mediated by dilution due to cell division. Light gray dashed lines assume that the complete pool of organellar proteins at the requisite abundance are replaced 5 times per cell doubling. Dark gray dashed lines assume that the complete pool of organellar proteins at the requisite abundance are replaced 50 times per cell doubling. Gray-shaded areas on the plots are provided for illustrative purposes to indicate the organellar genome copy numbers of yeast, metazoan, and plant cells. Cp, chloroplast; Mt, mitochondrion