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The intranuclear distribution of nuclear matrix-associated protein p107 and the 28-kD Sm antigen of U-snRNPs have been studied using double-label immunofluorescence and immunoperoxidase electron microscopy. In interphase nuclei of HeLa cells, Novikoff hepatoma cells, and rat kangaroo kidney cells, p107 was confined to discrete interchromatin domains. The(More)
The class of nonhistone chromosomal proteins that remains bound to DNA in chromatin in the presence of 2.5 M NaCl-5 M urea has proven refractile to biochemical analysis. In order to study its role in chromatin organization, we have produced monoclonal antibodies that are specific for the HeLa DNA-protein complex that remains after extraction of chromatin(More)
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