Figure 3

Genomic annotation of all spermatogenic tubule 19mers The origin of all 19mers from the spermatogenic tubule deep sequencing dataset were deduced from overlap with elements annotated in the UCSC Genome Browser [15]. The "Clusters" category refers to 94 pachytene piRNA clusters annotated by Lau et al. [20] and includes all 19mers mapped to these that were not otherwise annotated. The category "LTR" includes all Long Terminal Repeat sequences, including the Intracisternal A-Particle. Reads that mapped to multiple loci were randomly assigned to single loci.