FIG. 5.

Phylogenetic relationship of operons belonging to the γ₁-, γ₂-, and γ₃-fimbriae. The branch of the FUP tree representing γ₁-, γ₂-, and γ₃-fimbriae is shown on the left. The bootstrap value for the node defining each subclade is displayed at the top and was generated in the analysis performed for Fig. 2. Numbers at the end of each branch of the phylogenetic tree correspond to the numbers given for each operon in the center. The gene order for each operon is shown on the right (arrows). The predicted functions for each gene product and the sequence homologies to protein families are indicated in the legend at the bottom. IS, homology to IS element; in, homology to invasin domain PFAM05775; rt, homology to reverse transcriptase; ds, homology to DsbA.