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Raman spectroscopy analysis. a. Average Raman spectrum of the normal gastric mucosal epithelial cell line GES-1 compared to that for the gastric cancer cell line AGS. b. Sum of the Raman peak intensities of the major biomolecules of GES-1 and AGS. c. Comparison of the average Raman spectra for two gastric cancer cell lines with different degrees of differentiation: AGS and BGC-823. d. Sum of the Raman peak intensities of major biomolecules for AGS and BGC-823.
