FIG. 6.

Differential expression of common cartilage genes. Unsupervised hierarchical clustering of differentially expressed genes between undifferentiated hMSC (d0) and during 3D chondrogenesis (at 3, 7, 10, 14, 21, and 28 days), hNAC, and other neonatal knee tissues. Expression profiles were clustered by average linkage hierarchical clustering; common chondrogenesis genes are shown. The color scale of standardized signal intensities in the microarray extends from bright green (downregulation) to bright red (upregulation). Color images available online at www.liebertpub.com/tea