Effect of peptidoglycan modifying enzymes PgdA and Adr on growth of pneumococci in the presence or absence of lysozyme.

<p>Growth characteristics of the wild-type (WT) strain or defined mutants were compared by following the optical density (OD 620 nm). Once the broth culture reached mid-log phase, lysozyme (100 µg/ml) was added where indicated by an arrow. A) chicken egg lysozyme (+L) or B) recombinant human lysozyme (+Hu L). Graphs are representative of six independent experiments.