Supplementary Figure 10: Distribution of various classes of CRISPR-Cas systems and CRISPR spacers across phyla.
From: 1,003 reference genomes of bacterial and archaeal isolates expand coverage of the tree of life

The y-axis on the left shows the proportion of a particular class of CRIPR-Cas system within members of a phylum. Number of spacers (green line) is represented on the y-axis on the right.