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Unstimulated human lymphocytes, control cells, and nucleoskeleton preparations hybridized with the A (part of the transcribed unit) and DHH (part of the intergenic spacer) fragments of the ribosomal DNA. (a) Control cell, A fragment; (b) nucleoskeleton preparation, A fragment; (c) control cell, DHH fragment; (d) nucleoskeleton preparation, DHH fragment. Bar, 2 μm.
