Fig. 4.

a Proportion of each BlpC signal within genomes containing each blpH clade. The phylograms are simplified versions of Figs. 2 and 3. b The relative maximal expression levels of luc following addition of 1 μg/ml of synthesized BlpC signal peptide. The maximum expression level for each reporter strain was set to 1. Raw data are found in Fig. S5. c The minimum concentration of synthetic BlpC signal peptide required for luc induction in reporter strains with different BlpH. Asterisks indicate receptor/signal pair blp activation reported in [33]. Examples of raw data are provided in Fig. S6. The Bravo, Kilo, and Hotel signal peptides were not synthesized and are denoted with slashes