Figure 2

Principal component analysis and hierarchical cluster analysis of the proteins with differential abundance. (A) Scatter plots of the principal component analysis where green dots represent urine samples from BPH patients and red dots samples from PCa patients. (B) The hierarchical clustering result: higher abundance in PCa group is coloured in red, the lower ones in green. Column descriptors indicate the 4 samples per group (B = BPH; C = PCa) and the labeling dye, while the row descriptors indicate proteins with their spot numbers (given in Table 1). The dendrograms represent the distances between the clusters.