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. 2017 Jan 19;8:32. doi: 10.3389/fmicb.2017.00032

FIGURE 1.

FIGURE 1

Schematic view of SGI1 in the Proteus mirabilis chromosome. (A) Specific genetic traits of the SGI1 structure, the genetic rearrangement due to ISVch4, and the complex class 1 integrons are represented in frames. Genes and ORFs are shown as arrows, with their orientations of transcription indicated by the arrowheads. Black arrows indicate antibiotic resistance genes. White arrows within boxes represent insertion sequence elements. IRi and IRt are 25-bp imperfect inverted repeats defining the integrase and tni ends of complex class 1 integrons. The complex class 1 integrons were drawn from PCR mapping results and GenBank accession numbers AF261825 (SGI1), HQ888851 (SGI1-V), AY458224 (SGI1-H), and JX121638 (SGI1-PmABB). (B) Schematic view of PGI1 in the P. mirabilis chromosome. PCRs carried out to map the PGI1 backbone and junctions with the chromosome are indicated by thick black bars. Gray and white arrows represent the chromosomal genes and the backbone of the island, respectively.