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Neighbour- joining inferred tree based on 16S rRNA gene sequences showing the evolutionary relationship of bacterial isolates found utilising ε-caprolactam from solid waste dumpsites within previously characterised species. E. coli was used as ‘outgroup’. Type strains are indicated by T. Bar length represent the number of the base substitution per site. Bootstrap values expressed as percentage of 1,000 re-samplings of the neighbour-joining dataset are showed at nodes
