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Transmission electron micrographs of Escherichia coli. (A) Untreated samples, (B) treated with optP7 for 60 min, at 32 μg/ml, (C) and (D) treated with chloramphenicol for 240 min, 60 μg/ml, (E) and (F) treated with tetracycline for 240 min, 30 μg/ml.
