Fig. 5.

PG lactoyl-peptide profile of ΔdacA ΔdacB double mutant IU3957 compared to that of ΔdacA single mutant IU2825 in the unencapsulated derivative of strain D39. Bacteria were growing exponentially in BHI broth at the time of sampling. The identities of the labeled M1 tripeptide, M2 tetrapeptide, and M3 pentapeptide were confirmed by tandem MS analysis (data not shown; see Fig. 4).