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Comparison of the In42 variable region and a Tn1331 resistance genes fragment. The genetic maps of the variable region of In42 and a resistance genes fragment of Tn1331 are aligned. All attC loci are shown equally in the figure, but they are not identical at the nucleotide sequence level. The attI1* structure and functionality have been described [306]. The aac(6′)-Ib genes code for proteins that show differences at the N-termini, a known characteristic of this gene [141,309,310].
