Fig. 1
From: Spatial differentiation of metabolism in prostate cancer tissue by MALDI-TOF MSI
Scores plot from principal component analysis (PCA) of metabolites and lipids detected with MALDI MSI. The three first principal components (PC) are shown for both a negative and b positive ion mode data sets. Data points represent single mass spectra and are colored by tissue type: non-cancer epithelium (NCE, blue), cancer (red), and yellow (stroma)