Figure 5From: Two RND proteins involved in heavy metal efflux in Caulobacter crescentus belong to separate clusters within proteobacteriaPhylogenetic analyses of CzrA and NczA. Phylogenetic tree for the RND proteins was constructed using a neighbor-joining method. The tree was generated from multiple sequence alignment of protein sequences with higher than 55% identity to either C. crescentus CzrA or NczA, and the distances were calculated using CLUSTALX [40]. The branches were color-coded as follows: blue, Alphaproteobacteria; red, Gammaproteobacteria; orange, Betaproteobacteria; green, Chlamidiales. Some of the most prevalent genera present in each branch of the tree are indicated. The two separate clusters corresponding to either C. crescentus orthologs are indicated as follows: A, NczA orthologous group; B, CzrA orthologous group.Back to article page