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Fig. 3. Immunolocalization of Su(var)3-7 and HP1 on polytene chromosomes. Gray, DAPI; red, HP1; green, Su(var)3-7. (A-C) Detection of Su(var)3-7 protein on Su(var)2-504/Su(var)2-505 mutant (arrow) with heterozygote control Su(var)2-504 or 05/CyO on the same slide (dotted arrow). (D,E) Detection of HP1 protein on Su(var)3-79/Su(var)3-714 mutant.