PCA and NMF analysis on the gene-expression data of MSC, MSC-like (MSC-l, mClone-3), MAPC-1 (M-1), MAPC-2 (M-2) and ESC. (a) PCA on all differentially expressed genes with samples plotted in the first two components' space. (b) Consensus matrix from NMF on all differentially expressed genes. See Figure 3 for an explanation of the key in (b).
Ulloa-Montoya et al. Genome Biology 2007 8:R163 doi:10.1186/gb-2007-8-8-r163