Fig. 4.

Diverse conjugative elements carry RocRp homologs. (A) Sequence alignment of RocR and RocRp homologs found in Legionella species. Experimentally determined transcription start and termination sites are highlighted with bold green and red nucleotides, respectively. (B) Parsimony-based unrooted phylogenetic tree of the genes encoding RocRp homologs. (C) Schematic representation of MGEs carrying a RocRp homolog-encoding gene. Conjugative systems of the type F and T are colored in green and blue, respectively. Incomplete and unclassified conjugative systems are colored in orange and brown, respectively. RocRp homologs are represented as a red bar. Pairwise nucleotide sequence identity is represented by a gradient from light to dark gray.