Comparing proteomics and western blot analysis for catalase. A) Western blot membranes and quantification of catalase protein expression normalized to GAPDH protein expression. B) Proteomics quantification for catalase normalized to GAPDH. The samples used in the western blot were the same samples that were used in the proteomics analysis. C) A scatter graph to show the correlation between the quantification of the western blot and the proteomics analysis and a R2 value of 0.90 was achieved demonstrating excellent correlation.