Fig. 5From: Degenerate primers as biomarker for gene-targeted metagenomics of the catechol 1, 2-dioxygenase-encoding gene in microbial populations of petroleum-contaminated environmentsPhylogenetic analysis based on the 16S rDNA sequences of the phenol-degrading isolates. Neighbour-joining model is employed for the tree construction. Bootstrap values obtained with 1000 repetitions are indicated as percentages at the nodes and >50 % similarity in sequences are shownBack to article page