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The present study was undertaken to provide information on the presence and frequency of satellite nucleoli in cells with increased nucleolar biosynthetic activity. The number of hepatocytes containing satellite nucleoli was analyzed in rat liver, regenerating liver 18 h after partial hepatectomy and in Novikoff hepatoma ascites cells. In comparison with(More)
SUMMARY The acid-soluble nuclear proteins of regenerating and thi-oacetamide-treated rat livers as well as the Morris 9618A hepatoma and the Walker 256 carcinosarcoma were ex tracted from citric acid-isolated nuclei with 0.4 N H2SO4. The nuclear extracts were analyzed by two-dimensional polyacrylamide gel electrophoresis. Although most of the protein spots(More)
TO determine whether red blood cell-mediated microinjection of antibodies can be used to study nuclear protein localization and function, we microinjected antibodies that have been shown to react specifically with nucleolar acidic phosphoprotein C23 into Walker 256 cells. The intracellular distribution of microinjected anti-C23 antibodies and preimmune(More)
The cytosolic proteins and phosphoproteins of a mitomycin C-sensitive cell line were examined as progressively greater doses of mitomycin C were administered over a period of 44 weeks. Resistance of the human colon carcinoma cell line increased from a 50% inhibitory concentration of 1 to 6 ¿¿M over this time period. Changes in cytosolic protein patterns(More)
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