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Average and site-specific relative distribution of bacterial phyla in three individuals. Average and site-specific relative distribution of bacterial phyla in three individuals (S1, S2 and S3). Unclassified bacteria were reads without a recognizable match in the full 16S rRNA reference database. Sample legend: B - buccal, L - lingual, Appr - approximal surface of either an incisor (a front tooth) or a molar tooth.
