text: Using inverse PCR, DNA sequencing, check it out
  13 sul3-associated mutational integrons, no doubt
  Defective class 1 integrons, only two, y'all
  And one qnrB2-associated complex sul1-type class 1 integron, whoa
  
  We found 'em in Salmonella enterica serovar Choleraesuis
  Pseudomonas aeruginosa, Enterobacter cloacae, you can't refuse
  Conjugation and Southern hybridization, let me explain
  Unusual class 1 integrons, plasmids or chromosomal DNA, insane
  
  So listen up, this inverse PCR assay is the key
  Analyzing the 3' conserved region, it's a guarantee
  To uncover those unusual structures, no mystery
  Class 1 integrons on the move, that's the victory