Fig. 4.

Schematic representation of aerobactin operon and shiF. The large arrows represent the genes of the aerobactin operon and shiF IucA, iucB, iucC and iucD encode the operon allowing aerobactin synthesis and iutA encodes aerobactin receptor. The small arrows annotated P1 and P2 represent the primers described in Table 1 and are located in front of their hybridizing sequences