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B. A. Number of phylotypes observed. Number of phylotypes observed. Number of apsA gene clones screened. Number of 16S rRNA gene clones screened.
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B A Number of phylotypes observed Number of phylotypes observed Number of apsA gene clones screened Number of 16S rRNA gene clones screened Figure 1S: Comparison of the rarefaction curves generated for bacterial 16S rRNA and aprA gene sequences. A) Sequences obtained with 16S rRNA primer sets. B) Sequences obtained with aprA gene primer.