SAGE reveals gene expression differences between the SRC tumors and normal cartilage as well as gene expression differences between SRC tumors. (A) Expression of extracellular matrix genes. (B) Expression of extracellular matrix modifying proteases. (C) Expression of genes related to cell motility. (D) Expression of components of the AP-1 transcription factor complex. (E) Expression of growth factors. The Heat map represents relative gene expression. Actual expression values are listed to the right of the heat map.