Figure 3

Structure and characterization of Integron. (A) Schematic representation of class-I integron with the gene cassette structure as determined in RL. Horizontal arrows show the gene orientation. (B) Schematic representation of comparison of class-I integron element between RL, P. aeruginosa plasmid R1033 transposon Tn1696 [GenBank:U12338.3], and P. aeruginosa class I integron Tn2521-In33 [GenBank:AF313471.1]. % Identity between the integron elements is based on BLASTN results at E-value cut-off = 1e-5. Horizontal arrows show the gene orientation. IRi and IRt stand for invert repeats. (C) Alignment results of 59-be element associated with dhfra1 gene in strain RL (topmost) with already determined classes of dhfr gene [72]. Vertical arrow indicates the intermediate variable sequence not shown in the alignment.