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Autolysis rates of strain Sh3 at different times (expressed as percent decrease in optical density at 620 nm [OD620]) in the presence of 1 μg/ml teicoplanin and different penicillin concentrations: ▤, 0.06 μg/ml; ░⃞, 0.25 μg/ml; ▨, 1 μg/ml; and ▪, 8 μg/ml. □, control (antibiotic-free medium).
