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Phylogenetic trees of catabolic gene fragments obtained from clone libraries and isolated pure cultures. a Genes encoding RHDs; b genes encoding C12Os; c genes encoding C23Os; d genes encoding G12Os; e genes encoding P34O. The sequences obtained from clone libraries were separated into different OTUs with 90% identity. Each OTU was shown in red bold, with proportion shown in the brackets. The sequences of fragments obtained from isolated pure cultures were shown in black bold
