Figure 3From: Mining metastasis related genes by primary-secondary tumor comparisons from large-scale databasesHeat map of A↔B comparison. Differently expressed genes were denoted in a heat map. Sample A (left cluster) is from primary liver tissues, sample B (right cluster) is from liver metastasis of colon cancer. As shown in Table 1, this result contains information of metastatic ability and tissues specificity (liver versus colon tissue). All heat maps from other comparison combinations are included in Additional file 2.Back to article page