Fig. 2.

TMBB content in bacterial proteomes and signal peptide prevalence among organisms. Colored by class/phylum, categories are sorted by decreasing median number of TMBBs. (A) Distribution of number of TMBBs in 2,959 reference and representative bacterial proteomes. TMBBs predicted with IsItABarrel that were within other datasets (gray), and updated numbers after a full search with IsItABarrel (color). Number of TMBB proteins per organism by class/phylum (boxplot), fold increase in number of TMBBs from the initial search (stars using log₁₀ scale at right). (B) Distribution of percentage of proteome predicted to encode TMBB proteins (same organisms as in A). (C) Percent of TMBBs with signal peptide detected by SignalP 5.0 for each organism, grouped by class/phylum.