Figure 1From: Gene Expression Profiling in Hereditary, BRCA1-linked Breast Cancer: Preliminary ReportPrincipal component analysis (PCA) performed on the whole set of 20 samples. The tumor (red and blue) vs. normal (green) difference is clearly visible within the 1st component, which accounted for 24.06% of total variance. PCA is unable to reveal a difference between hereditary (red) and sporadic tumors (blue).Back to article page