Unsupervised hierarchical clustering of normal human tissues based on the variation of miRNA abundance demonstrates similar patterns as shown in Figure 2. Normalized CT for each assay was transformed into ΔCT against the average CT of all assays examined and clustered without centering the data. A pseudocolor scale outlines the CT values represented in the heat map. A detailed view of the clustering patterns of normal tissues is on the right.
Liang et al. BMC Genomics 2007 8:166 doi:10.1186/1471-2164-8-166