FIG. 1.

Genetic organization and partial restriction map of the 4.8-kb PstI fragment showing restriction sites used for cloning various constructs. Genes encoded on the fragment are shown as boxes. The ▾ symbol indicates the insertion site for the Ω fragment. Complementation of P. aeruginosa pilD and pilC mutants, indicated by restoration of PO4 phage sensitivity, is shown on the right. The vvpD probe derived from the 1-kb SalI fragment used in Southern blots is shown as a bar at the bottom.