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Northern blot analyses of RNAIII, transcripts of five clinical MRSA isolates with an agr-I (CC45) background (A) and five clinical MRSA isolates with an agr-II (CC5) background (B). Transcripts and time points are indicated. Ethidium bromide-stained 16S rRNA patterns are shown as an indication of RNA loading. Isolates with strong delta-hemolysin activities are underlined.
