*3.3. Oral Microbiome Profile of Centenarians*

Figure 1A shows the relative abundance of detected bacteria at the phylum level. On both denture plaque and the tongue, Firmicutes were abundant. Figure 1B shows the phylum level proportion of bacteria of the four subjects. For three subjects, Firmicutes were abundant in both saliva and the tongue. Proteobacteria were relatively abundant in the saliva and tongue of one subject. Dynamic pie charts are presented in the Supplementary Materials.

**Figure 1.** Proportion of phyla in denture plaque and the tongue: (**A**) total, and (**B**) individual subjects.
