Figure 1.
Schematic representation of the variable regions of class 1 integrons identified in K. pneumoniae isolates.
Integron type with different cassette arrays (type I to X) are arranged as identified in Table 1. Gene cassettes are shown as boxes, with arrows indicating the orientation of transcription and hollow circles indicating the 59-base elements. The 5’- and 3’-conserved segments (5’-CS and 3’-CS) are annotated.
Figure 2.
Comparison of the type IV integron in this study with its E. coli homologue in database.
Sequence of E. coli strain DJ33-7 class I integron (JF806489) was retrieved from NCBI. The type IV integron (JQ823011) is arranged as indicated in Table 1. Gene cassettes are shown as boxes, with arrows indicating the orientation of transcription. The 5’- and 3’-conserved segments (5’-CS and 3’-CS), attC, attI sites are annotated. Dashed box indicates a 590-bp deletion in the type IV integron.