Genetic environment of the blaVEB-1a gene in A. punctata isolates 1 to 6, A. allosaccharophila isolates 7 and 8, A. veronii isolates 9 and 10, and A. media isolate 11. The coding genes are represented by arrows indicating their translation orientation, the left and right inverted repeats of IS elements are shown by filled and empty triangles, respectively, and the core sites are indicated as circles. IS6100, IS26, and tnpF-like genes (gray rectangles) are recovered in most structures. TnpF-like is a putative integrase from Acinetobacter genomospecies 3 (GenBank accession no. GQ926879). TnpA-11 (arrow with gray squares) from A. punctata 1 to 4 shares 83% amino acid sequence identity with the sequence of transposase_11 from A. punctata (GenBank accession no. YP_067863). Av9_1 and Av9_2 from A. veronii 9 are proteins of unknown function.