Additional file 1.

Position-effect variegation (PEV) analysis of male flies of small RNA and RNA Pol II mutations. The trans heterozygote of RNA Pol II and small RNA pathway mutations showed very strong suppression of In(1)w [m4h] PEV compared with control and single heterozygote mutants. All the male flies were of same age (4 days after eclosion).

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Kavi and Birchler Epigenetics & Chromatin 2009 2:15   doi:10.1186/1756-8935-2-15