منابع مشابه
Fractionation of liver chromatin.
Rat liver chromatin has been fractionated into two fractions on the basis of precipitability in standard saline after mild treatment with DNase II. The major portion of liver chromatin contains little nonhistone protein and is enriched in histones, while a minor portion of such chromatin, with which RNA polymerase is associated, is highly enriched in proteins other than histone and impoverished...
متن کاملFractionation of Chick Oviduct Chromatin
Chromatin isolated from several chick tissues was treated with micrococcal nuclease. A limited degree of tissue specificity of chromatinDNA resistance to nuclease digestion was observed. No difference in the extent of nuclease resistance of chromatin DNA was detected during oestrogen-induced oviduct differentiation. This suggested that the amount of non-histone chromosomal protein does not play...
متن کاملFractionation of growth-stimulating factor in liver.
In a previous paper (1) results were presented to show that an alcoholic extract of liver produced a pronounced growth stimulation in rats fed a natural diet. The results showed that the activity was not due to any of the known vitamins and that yeast did not possess similar activity. Bosshardt and collaborators have described a growth-stimulating effect of liver in rats (2), while Zucker and Z...
متن کاملFractionation of azopeptides in tryptic digests of rat liver.
Since the pioneer demonstration in 1947 by Miller and Miller (8) of the incorporation of the carcinogen 4-dimethylaminoazobenzene (DAB) into protein of the target organ, rat liver, a growing body of evidence has accumulated which suggests that carcinogen binding is of causal significance in carcinogenesis (5, 9, 10). The importance of these findings has stimulated much further research into thi...
متن کاملFractionation of liver plasma membranes prepared by zonal centrifugation.
1. Plasma membranes were isolated from crude nuclear sediments from mouse and rat liver by a rate-dependent centrifugation through a sucrose density gradient contained in the ;A' type zonal rotor. 2. The membranes were further purified by isopycnic centrifugation, and characterized enzymically, chemically and morphologically. 3. When the plasma-membrane fraction of sucrose density 1.17g/cm(3) w...
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ژورنال
عنوان ژورنال: Proceedings of the National Academy of Sciences
سال: 1971
ISSN: 0027-8424,1091-6490
DOI: 10.1073/pnas.68.12.2941