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. 2016 May 11;6:25775. doi: 10.1038/srep25775

Figure 1. A 16S rRNA gene sequence-based tree indicating the position of four methanogens detected by PCR-sequencing in ancient dental calculus samples in France.

Figure 1

Bootrap values ≥95% are indicated at nodes. The 16S rRNA archaeal sequences with their accession number were presented with a bubble.