FIGURE 6.

McdAB systems are widespread among carboxysome‐containing proteobacteria. (a) Table highlighting the prevalence and genomic context of all identified α‐McdAB sequences within α‐carboxysome‐containing proteobacteria. (b) Genomic arrangement when α‐McdAB are encoded within the cso operon. (c) Genomic arrangement when only α‐McdB is encoded within the cso operon. (d) Genomic arrangement when one copy of α‐McdB is encoded within the cso operon and a second copy of α‐McdB is encoded next to α‐mcdA at a distant locus. (e) α‐McdAB systems are widely distributed among proteobacterial taxonomic classes (left), orders (center), and metabolisms (right) [Colour figure can be viewed at wileyonlinelibrary.com]