Additional file 7: of Diverse RNA interference strategies in early-branching metazoans

Nucleotide biases of endo-siRNA clusters. Nucleotide biases along the length of all sRNAs mapping to predicted endo-siRNA clusters. sRNAs were anchored at their 5′ nucleotide and biases are displayed as a percentage of the contribution of each nucleotide at each position. Of note is the tendency for a uracil at position 1 which is present in all libraries except the Drosophila 1st instar larval libraries. (PDF 328 kb