Altered expression of Glucose 6 phosphate-1 dehydrogenase (G6PD). Graphical representation and zoomed in regions of 2D-DIGE gel images to demonstrate altered expression of one of the differentially expressed proteins common to cell line pairs A and B, i.e. Glucose 6 phosphate-1 dehydrogenase (G6PD), decreased in both 'SQp' cell lines compared to 'NSQp' cell lines at all time points over 10 days of culture. G6PD expression in (A) Cell Line Pair A and (B) Cell Line Pair B. (i) Left panel, zoomed in regions of 2D-DIGE gel images of G6PD at days 3, 7 and 10; (ii) Right panel, graphical representation from DeCyder 6.5 software analysis of the standardized log abundance of the spot intensities of G6PD at days 3, 7 and 10. (Blue data points - 'SQp' samples; red data points - 'NSQp' samples).