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Quantification of intracellular non-protein thiols as measured by dithiobis nitrobenzoic acid in human cancer cells HT29 and DU145 after 4 hours incubaton in the medium with and without glucose. Each data point plotted was the mean ± standard error (SE) of at least three experiments with SE as shown unless smaller than points plotted. Statistical comparisons for non-protein thiol (NPSH) levels in glucose free medium relative to glucose medium was not significant.
