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Impact of piwi knockdown in the germline on H3K9me3 marks at transposons. Normalized densities of the repressive mark H3K9me3 (top plots) are compared with piRNA distributions (bottom plots) in control animals for HeT-A, TART, TAHRE, and jockey. Black and red are H3K9me3 enrichments over input in control (nos-white) and nos-piwi samples, respectively.
