Fig. 2

Gene expression pattern among different MT regions of P. striatus. A PCA for nine sequenced cDNA libraries, with the first two principal components (PC1 and PC2) based on transcriptomic results being shown. Each solid dot represents an individual cDNA library. B Hierarchical clustering heatmap of global gene expression based on normalized RPKM values from different regions. Red indicates higher expression, and yellow indicates lower expression. C Venn diagram exhibiting the number of common and unique unigenes between pairwise comparisons