Fig. 3
From: GFRA3 promoter methylation may be associated with decreased postoperative survival in gastric cancer
Hierarchical clustering of the normal and tumor samples. Top row: Tumor samples are shaded grey, normal gastric tissue samples are white. A value of 0.00 (most green) indicates fully unmethylated, whereas a value of 1.00 (most red) indicates entirely methylated locus. Most normal tissue samples seem to concentrate on the left side of the heatmap, whereas most tumor samples aggregate on the right, indicating similarities within the two groups