FIG. 4.

Arrangement of tad genes in A. actinomycetemcomitans and other microorganisms. The top line shows the tadABCDEFG genes of A. actinomycetemcomitans (Aa) strain CU1000N. The locations of the IS903φkan insertions in specific mutant strains are indicated by downward arrows. Below are tad-related genes from P. multocida (Pm), Y. pestis (Yp), P. aeruginosa (Pa), C. tepidum (Ct), and P. horikoshii (Ph). The tad sequences for organisms other than A. actinomycetemcomitans were obtained from individual genome sequencing projects as described in Materials and Methods. The scale bar at the bottom is in kilobase pairs.