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Phylogenetic analysis of smtB-zur operon organization. Sequences homologous to MSMEG smtB-zur (MSMEG_4486-87; accession no. NC_008596; bases 4569200 to 4569951) were identified by BLASTN. A distance tree of results (neighbor joining tree, maximum sequence difference of 0.75) was generated and displayed using Geneious 11.1.5. Closely related clusters are indicated by color.
