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. 2011 May 26;6(5):e20584. doi: 10.1371/journal.pone.0020584

Figure 2. Unsupervised hierarchical clustering of methylation array data.

Figure 2

All cell lines segregate from primary tissue by the second branch point of the dendrogram. All tumor/xenografts pairs cluster separately from the normal mucosa specimens by the fourth branch point of the dendrogram. Primary tumors and their corresponding xenografts cluster together after the terminal branch points.