Figure 7. Hierarchical-clustering using the "SAM264" gene set and 78 tumor samples. A. The full cluster diagram scaled down. B. The luminal epithelial specific gene cluster including the estrogen receptor is expressed by the Luminal Subtype A-C tumors color-coded as in Figure 1. C. The basal epithelial gene cluster expressed by the Basal-like tumors and the Normal Breast-like tumors. D. The proliferation cluster. These genes are mainly expressed by tumors in the Basal-like, the ERBB2 and Luminal Subtype C groups of tumors.