A. ΔltgAΔltgD double mutant, ltgA+ltgD+ double complement, ΔpacA, ΔltgAΔltgDΔpacA, and pacA+ complement in ΔltgAΔltgDΔpacA were exposed to 100 µg/mL human lysozyme for 90 min. Gc survival is expressed as in Fig. 3A. *P<0.05; two-tailed t-test, n = 3 to 6 biological replicates.
B. ΔltgAΔltgD double mutant and ltgA+ltgD+ double complement Gc were exposed to increasing concentrations of mutanolysin for 3 hr. Gc survival is expressed as in Fig. 3A. *P<0.05; two-tailed t-test, n = 3 biological replicates.