Figure 4From: Quantitative analysis of polycomb response elements (PREs) at identical genomic locations distinguishes contributions of PRE sequence and genomic environmentDeletion analysis of the vg Polycomb response element (PRE). (A) Eye phenotype of transgenic fly lines; 5-day-old male flies are shown. In each row, (top) heterozygous and (bottom) homozygous transgenic flies are shown, carrying the mw reporter alone (no PRE), the 1.6 kb vg PRE, a deletion of the first 106 bp (vg Δ100) and the first 291 bp (vg Δ300) of the 1.6 kb vg PRE, at landing sites (top) 2 and (bottom) 3. (B,D) Quantification of pigment levels of the heterozygous and homozygous transgenic vg Δ100 and vg Δ300 deletion lines at landing sites (B) 2 and (D) 3. (C,E) Pairing-sensitive silencing (PSS) of transgenic vg Δ100 and vg Δ300 deletion lines at landing sites (C) 2 and (E) 4, calculated as in Figure 3.Back to article page