Fig. 2

Twelve distinct structures connecting the variable regions of the class 1 integron structures and the ISCR1-linked resistance genes in MDR Gram-negative bacteria. The types of the structures were marked from A to L. ISCR1 is represented by red boxes; integrase is represented by yellow boxes; the qacEΔ1/sul1 is denoted by gray boxes; Open reading frames are indicated with open boxes having their own individual color and the direction of their transcription is indicated with arrows