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The Repertoire of ICE in Prokaryotes Underscores the Unity, Diversity, and Ubiquity of Conjugation

Figure 4

Distribution of ICEs and conjugative plasmids in the different groups of the VirB4 phylogenetic tree.

(See also Figure 6.) The VirB4 families correspond to the four previously described proteobacterial MPF types (T, G, F and I) plus four additional families, associated with either host phyla (bacteroidetes, cyanobacteria) or mixtures of phyla (FA = firmicutes plus actinobacteria) or FATA (firmicutes, actinobacteria, tenericutes and archaea).

Figure 4