Figure 2.

The expression of RB1, p16^INK4a and cyclin D1 varies across the breast cancer intrinsic subtypes. Box plot comparisons of (a) Retinoblastoma (RB) 1, (b) proliferation signature, (c) p16^INK4a and (d) cyclin D1 mRNA expression relative to the five intrinsic subtypes as defined by the five-class centroid predictor.