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Comparison of the schematic structures of the blaVIM-4-carrying class 1 integrons from Hungary. Open ellipses, attI1 site; black circles, 59-base elements; asterisks, blaVIM-4 cassettes with the 170-bp duplication; 5′-CS and 3′-CS, 5′ and 3′ conserved sequences, respectively. GenBank accession numbers and isolates harboring the integrons are as follows: (a) AY509609 and isolate PA396, (b) AY702100 and isolate PA555, (c) isolate MB387, (d) DQ357197 and isolate MB197.
