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- W2073684826 abstract "The different proteins present in chromatin of Escherichia coli have been analyzed by a variety of techniques. The chromatin was isolated using a previously published procedure (Sjåstad, K., Fadnes, P., Krüger, P.G. Lossius, I. and Kleppe, K. (1982) J. Gen. Microbiol. 128, 3037) and solubilized by the action of micrococcal nuclease or DNAase I. The DNA-protein and RNA-protein complexes thus obtained were purified by sucrose gradient centrifugation and isopycnic gradient centrifugation in metrizamide in low ionic strength. The protein: DNA ratio of the DNA-protein complexes was estimated from the latter method and found to be approx. 1.75. The protein components were analyzed further by one- and two-dimensional gel electrophoresis. Approx. 15 major polypeptides were detected in the DNA-protein complex, whereas 10 were present in the RNA-protein complex. The majority of the polypeptides in both complexes had acidic isoelectric pH. The polypeptides in the two complexes differed markedly and only two polypeptides, having molecular weights of 57 000 and 37 000, respectively, were found to be common in both complexes. In agreement with earlier studies, the basic protein HU was not present in the DNA-protein complex. Affinity studies of the proteins from chromatin using DNA- and RNA-Sepharose columns in general confirmed the above conclusions. The two-dimensional gel electrophoretic patterns of the proteins in the different complexes were compared with those of proteins in the inner and outer membranes. Only one of the major polypeptides present in the inner membrane, having a molecular weight of 57 000, was enriched in the DNA-protein complex." @default.
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- W2073684826 date "1987-02-01" @default.
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- W2073684826 title "DNA- and RNA-binding proteins of chromatin from Escherichia coli" @default.
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- W2073684826 doi "https://doi.org/10.1016/0167-4781(87)90058-3" @default.
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