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(A) Co-immunostaining of H3K9me3 (red), HP1 (green), uH2A (green) with antibodies to SCP3 (red) (marker of pachytene stage) was used to distinguish between spermatocytes I and round spermatids; (B) Immunostaining (H3K9me3, green) combined with DNA FISH (MS4 repeat, red); (C) Co-immunostaining of H3K9me3 (green) and H4K20me3 (red). Nuclei were counterstained with DAPI (blue).
