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. 2023 Jan 5;8(1):40–54. doi: 10.1038/s41564-022-01284-9

Fig. 4. The ancestral chlamydial respiratory chain has undergone expansion in Amoebachlamydiales.

Fig. 4

a, Schematic of respiratory complexes found in Chlamydiae, with substrates and complexes. b, Presence and absence of respiratory complexes across chlamydial ancestors. Presence is defined as ≥50% of complex subunits. c–e, ML phylogenies of the NuoG subunit of proton-transporting NADH dehydrogenase (NuoA-N) (c), the CyoA subunit of cytochrome o ubiquinol oxidase (CyoA-D) (d) and the AtpD subunit of proton-driven ATP synthase (AtpA-H) (e), inferring with the LG model of evolution. Circles indicate ufBP bipartition support. Collapsed clades are annotated and coloured if most sequences have the same taxonomy. Scale bars indicate the number of substitutions per amino acid position in the alignment. See also Supplementary Data 6 for trees of all complex subunits and Supplementary Data 9 for inferred presence across all Chlamydiae ancestors.