ERBB2 and neoplasm: Fig 5 shows the heatmap plot of these genes along with their class names on X-axis. Here red signifies higher expression levels, green signifies lower expression levels and black signifies moderate expression levels. It is also seen from the Fig 5 that for a particular tumor class identified genes are either up-regulated or down-regulated. List of selected gene markers for Her2, Basal, LumA, LumB classes are reported in Table 6.