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Glucose metabolism in normal and virus-transformed chick embryo fibroblast cells in culture was observed by allowing the cells to metabolize [U-14C]glucose plus glucose labeled with tritium in the C-1, C-3, and C-6 positions. Similarities and differences between normal and transformed cells were observed and measured. Both normal and transformed cells are found to metabolize about 20% of the glucose via the oxidative pentose phosphate cycle, with the rates being about twice as much for transformed cells as for normal cells under the chosen conditions. Nevertheless, the ratio of glucose metabolized via oxidative pentose cycle to the net flow of that metabolized directly to fructose 6-phosphate is about the same in normal and transformed cells. Although the rate of flow of [14C]glucose into the tricarboxylic acid cycle intermediates and amino acids derived from them appears to be the same in normal and transformed cells, the rate of tritium incorporation from H3HO into these intermediates seems to be much higher in normal cells.

hoppe-seyler's zeitschrift für physiologische chemie

Metabolism in Normal and Virus-Transformed Chick Embryo Fibroblasts as Observed with Glucose Labeled with  14 C and Tritium and with Tritium-Labeled Water