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rRNA subnuclear organization is altered in atxr5/6. (A) FISH localization of 45S loci (NORs; green signals) and 5S (red) rRNA gene loci in leaf interphase nuclei, comparing wild type (Col-0), atxr5 mutants, and atxr5/6 double mutants. Nuclei were counterstained with DAPI (blue). Bar, 5 μm. (B,C) Histograms representing the number of NOR-FISH signals observed per nucleus (B) or the proportion of nucleolus-associated NOR-FISH signals (C).
