Fig. 2

Bar graphs representing the percentages of shared spacers across all subjects and spacer types. Spacers shared when all subjects are compared are shown in gray, when only subjects with periodontal health are compared are shown in white, when only subjects with periodontal disease are compared are shown in black, and for comparisons between subjects with periodontal health and disease are shown in red. The y-axis represents the percentage of spacers shared, and the x-axis represents the number of different subjects sharing spacers. The bars representing ‘1’ are unique to individual subjects, and ‘2’ represents spacers shared by only 2 different subjects, and so on. Few spacers across all spacer types are shared in more than 2 different subjects. Panel A—SGI CRISPR spacers, Panel B—SGII CRISPR spacers, Panel C—GHI CRISPR spacers, and Panel D—VSI CRISPR spacers