Fig. 4From: A transcriptional landscape of 28 porcine tissues obtained by super deepSAGE sequencingK-means clustering analysis of differentially expressed genes across tissues. Data adjustment (median center and normalization) was performed before the clustering analysis. The color codes of red, white, black, and dark green represent high, average, low, and absence of expression, respectively. A detailed view of expression pattern and internal structure of each gene cluster were constructed by hierarchical clustering and is shown in plot areas from 1–10Back to article page