Figure 1

Hierarchical clustering of luminal and non-luminal breast tumour samples. The 43 most significant genes from the ANOVA analysis (luminal vs. non-luminal, p < 0.01), excluding the control samples, were used in a hierarchical clustering analysis. Coloured branches represent the different subtypes as previously determined using other DNA microarray platforms [9,10]: Dark blue = luminal A, light blue = luminal B, green = normal-like, red = basal-like and purple = ERBB2+. M = early breast cancer, F = locally advanced breast cancer.