FIGURE 7.

α‐carboxysome evolution among proteobacteria and α‐cyanobacteria. (a) Inferred phylogeny of α‐carboxysome‐containing proteobacteria and α‐cyanobacteria. Line colors: α‐McdAB found within cso operon (black), only α‐McdB found within cso operon (red), and neither α‐McdAB found within cso operon (blue). Black dot represents >70% bootstrap support (500 replicates). Green asterisk represents a shared cso operon ancestor among α‐cyanobacteria and proteobacteria that lacks the α‐mcdA gene. (b) Genomic arrangement of the H. neapolitanus cso operon. (c) Genomic arrangement of the T. halophila cso operon. (D) Genomic arrangement of the C. gracile cso operon, which lacks a McdAB system [Colour figure can be viewed at wileyonlinelibrary.com]