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Map of the EcoRI fragment of pMG252 encoding quinolone resistance. The qnr gene is immediately upstream from qacEΔ1, which encodes resistance to quaternary ammonium compounds, and sulI, an unexpressed gene for sulfonamide resistance. Two copies of orf513, found in integrons In6 and In7, surround these genes. Restriction sites mentioned in the text are also shown.
