PDF file - 89K, A. Gene expression profiles of widely used breast tumour cell lines were extracted from three different data sets, normalised and clustered into the designated molecular subtypes. The expression of PIP4K2A, 2B and 2C are graphically shown below. B. Box plots representing the expression of PIP4K2B in the three molecular subtypes determine by cluster analysis. C. Expression of PIP4K2B in normal cells (MCF10A) and luminal cells (MCF7) and ERBB2 positive cells (ZR-75).