fig5

From: A pilot study for distinguishing basal cell carcinoma from normal human skin tissues using visible resonance Raman spectroscopy

Figure 5. The changes in the resonance Raman fingerprints represented by the ratios of peak intensities of biomarkers. The 1,589 cm^-1 mode is supposed to be arising from tryptophan; 1,452 cm^-1 mode is assigned to fatty acids-lipid protein molecules; 1,662 cm^-1 mode is amide I combined with type I collagen; the largest ratio (I1589 to I1452) changes occurred at a depth of 100 µm in the BCC tissue (left). Based on student’s t-test, the difference between normal and BCC samples is shown to be statistically significant (P < 0.05) for all biomarkers. BCC: basal cell carcinoma