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Figure 3


Fig. 3. stwl mutants are dominant suppressors of position-effect variegation. (A) Eye of DX1 flies showing strong variegation. (B,C) Eyes of DX1 flies also heterozygous for stwl alleles showing suppressed variegation. (D) The DX1 variegated phenotype was dominantly suppressed by a mutation in the histone methyltransferase encoded by the Su(var)3-9 locus. (E) Graph of optical density of extracted pigments from flies of the indicated genotypes.