Fig. 2

Small RNA read length distribution. a Sequenced reads were trimmed to ≥18 nt, and the distribution of the remaining reads for each sample was plotted, showing that 97% of reads had a length of between 21 and 24 nt. b Total read counts from pooled cytoplasmic and pooled nuclear fractions (i.e. including both large and small GCs) were aligned to the pig genome and their mapping to various RNA species was graphed. Each rectangle is proportional to the percentage of reads mapped to each category relative to the total read counts