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Microscopy of wild-type polytene chromosomes. (A) Portion of chromosome arm showing localization of Mod. (B) Chromosome arm in A showing localization of dCBP. (C) Merged image of A and B. Large arrowhead indicates locus that binds Mod and not dCBP. Small arrowhead indicates band that binds dCBP and not Mod. Small arrows indicated loci that colocalize both dCBP and Mod, and are shown in yellow. Images were taken with a 40× objective.
