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D. virilis HipHop foci in both somatic and sperm nuclei. A–C are merged images from a D. virilis strain transformed with a gfp-tagged hiphop transgene. DAPI signals are in white, and GFP signals in red. (A′–C′) GFP signals only. (A and A′) Cells from the mitotic compartment at the tip of the testis showing GFP-HipHop nuclear foci. (B and B′) A bundle of spermatids with HipHop foci. (C and C′) Two mature sperm with HipHop foci.
