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Fig. 5. The Su(var)3-7 wild type protein recruits the HA:{Delta}7-Ct construct. Double staining of polytene chromosomes using an anti-HA antibody (red), an anti-Su(var)3-7 antibody (green), and DAPI (blue). Top: chromosomes of homozygous yw; HA:{Delta}7-Ct larvae; bottom: chromosomes from heterozygous yw; HA:{Delta}7-Ct/+; P{HS-Su(var)3-7}/+ larvae. Control and test chromosomes were squashed on the same slide in this experiment to allow for semi-quantitative evaluation.