Figure 6. Neighbor-joining tree of DNA (A) and amino acid (B) concatenated gene sequences of Mycobacterium chelonae variant (CV) isolates and reference strains of the M. chelonae-abscessus complex. Branch support is recorded at nodes as a percentage of 1,000 bootstrap iterations. Upper scale bar indicates nucleotide substitutions per site and lower scale bar indicates amino acid substitutions per site. CIP, Collection of Institute Pasteur; CCUG, Culture Collection, University of Göteborg, Sweden; CV, M. chelonae variant; ATCC, American Type Culture Collection.