Abstract
Hamster liver nuclei were fractionated by digestion with micrococcal nuclease into nuclease released (SP) and nuclease resistant (PP) fractions varying in chemical composition and transcriptional activity. Electrophoretic analysis of histones from SP and PP showed no qualitative and quantitative differences. Apparently chromatin-bound protease activity can be found in both fractions. Nonhistone chromatin proteins isolated from SP and PP under mild conditions were fractionated by hydroxyapatite chromatography into NHCP1, NHCP2, NHCP3 and molecular heterogeneity and specificity were tested by SDS-polyacrylamide gel electrophoresis.
The differences observed in nonhistone proteins are mainly of quantitative nature, however some specific polypeptides for SP and PP are observed.
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Kiliańska, Z., Lipińska, A., Krajewska, W.M. et al. Distribution of chromatin proteins between fractions of hamster liver chromatin differing in their susceptibility to micrococcal nuclease. Mol Biol Rep 8, 203–211 (1982). https://doi.org/10.1007/BF00776581
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DOI: https://doi.org/10.1007/BF00776581