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. 2020 Apr 16;10:6519. doi: 10.1038/s41598-020-63561-z

Figure 2.

Figure 2

Diversity rarefaction curve of the V4 (dotted line) and V9 (solid line) operational taxonomic units (OTUs) with 97% identity threshold. The saturation of curve indicates that the diversity of OTUs in the present study was mostly covered by the V4 and V9 sequences.