(A) Distribution of cloned smRNAs matched to the six Ssp2 CRISPR loci (The genome coordinates of each Ssp2 CRISPR locus are as follows: 1, 1233466–1239935; 2, 1254482–1260452; 3, 1297153–1299148; 4, 1305634–1311637; 5, 1744006–1744417; 6, 1809772–1811221). Each predicted Ssp2 CRISPR-derived short guide RNA (crRNA) locus is represented by a box, and the crRNA (box) numbers associated with each locus are indicated above. A shaded box indicates at least one smRNA clone matched to the locus in this work, and the number of smRNA reads is indicated below the shaded box. (B) Size distribution of CRISPR-specific smRNAs. Redundant and unique smRNA reads are represented as white and gray bars, respectively.