A Comprehensive Curation Shows the Dynamic Evolutionary Patterns of Prokaryotic CRISPRs

Figure 3

Histograms of the genome numbers (in vertical axis) versus the CRISPR numbers per genome (in horizontal axis). The summaries are conducted for the taxonomic domains of (a) at least 30 genomes and (b) 30–100 genomes, each of which has at least one CRISPR.

(a)

(b)