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- W2009769800 abstract "Isolated liver nuclei were extracted 3 times at pH 7.2 with solutions containing either (1) monovalent cations, (2) both mono- and divalent cations, or (3) sucrose solutions containing only divalent cations. The extracted proteins were analysed by two-dimensional acrylamide gel electrophoresis and the ultrastructural alterations of the treated nuclei were examined by electron microscopy. The solutions containing Na+ or K+ monovalent and Ca2+ and Mg2+ divalent ions extracted the same amount (18–22 %) of the nuclear proteins. The two-dimensional gel electrophoretic patterns of these extracts were nearly identical and the structures of the nuclear components were well preserved even after 3 times repeated extractions. The solution containing only Na+ extracted less protein (14–15 %) than the solutions containing both mono- and divalent cations. Extraction with isotonic NaCl solution altered the nuclear and nucleolar morphology; unlike the other solutions employed, this solution extracted some DNA and histones. The isotonic sucrose solution containing only divalent cations extracted less protein than the other solutions (9–11 %) and produced marked condensation of the chromatin. These analytical and electron microscopic studies showed that mono- and divalent cations play a role in structural organization of chromatin." @default.
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- W2009769800 date "1974-03-01" @default.
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- W2009769800 title "Effects of various ionic media on extraction of soluble nuclear proteins and on nuclear ultrastructure" @default.
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- W2009769800 doi "https://doi.org/10.1016/0014-4827(74)90230-4" @default.
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