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- W2470957079 abstract "We report here a novel class of human autoantibodies with immunological affinity for constitutive heterochromatin. Indirect immunofluorescence localized different proteinaceous antigens to the AT-rich paracentromeric heterochromatin of mouse chromosomes, the GC-rich heterochromatic regions of sheep chromosomes, and the large C-banded regions of human chromosomes 1, 9, and 16. Minor amounts of the heterochromatin-associated proteins were uniformly distributed on the chromosomes of all vertebrate species. Their antigenic determinants have been highly conserved during evolution. The chromosomal distribution of the heterochromatin-associated antigens is not altered in interspecific somatic cell hybrids but apparently reflects a stable structural property germane to each chromosome type. The antigenic proteins remain bound to their respective epitopes throughout the entire cell cycle and in meiosis. The heterochromatin-associated antigens represent a major nonhistone component of the mitotic chromosome scaffold and the interphase nuclear matrix. Immunoblotting performed with a human autoimmune serum to mouse heterochromatin revealed a characteristic pattern of polypeptides with molecular weights ranging from 35 to 120 kDal. Drugs that interfere in vivo with the higher-order chromatin structure had no effect on the expression and chromosomal distribution of the heterochromatin-associated antigens. However, the antibody binding sites in chromatin can be completely masked by treating fixed cell preparations with certain DNA-binding ligands." @default.
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- W2470957079 date "1990-01-01" @default.
- W2470957079 modified "2023-09-24" @default.
- W2470957079 title "Immunocytogenetics" @default.
- W2470957079 doi "https://doi.org/10.1159/000132892" @default.
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