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Abundance of 24-nucleotide siRNAs in castor bean embryo and endosperm tissues. A, Number distribution of siRNAs in the gene body from the 5′ end (left) to the 3′ end (right) and flanking 2-kb regions. B, Number distribution of siRNAs in the TE and flanking 2-kb regions. C, Methylation levels of all three sequence contexts in TEs within siRNA coverage. D, Abundance of 24-nucleotide siRNAs located to the CHH hypermethylated and hypomethylated regions.
