FIG. 2.

Infection of S. aureus strain 68 with an MOI of 100 (•) and an MOI of 5 (○) at time zero culminated in lysis 15 and 40 min thereafter, respectively. Purified protein 17 (50 ng/ml) was added 10 min prior to infection (□) or 20 min postinfection (▵) with phage P68 or immediately before the onset of lysis (×). Results from a representative experiment of three independent experiments are shown. OD₆₀₀, optical density at 600 nm.