Fig. 1

Heat map illustrating the expression of OPN in 8 wild type mammary glands (WT), 12 primary mammary tumors (PMT) and 8 recurrent spindle tumors (RST) that arose in MTB-IGFIR transgenic mice as determined by cDNA microarray analysis. Numerical values in the box represent OPN expression relative to a universal mouse reference RNA sample. Microarrays were performed using Agilent Whole Mouse Genome 4 × 44 k Gene Expression Arrays (product number G4122F, Agilent) as described in [31]