Cancer-linked gene sequences, and derived amino acid sequences, are disclosed along with methods for assaying for potential antitumor agents based on their modulation of the expression of these cancer-related genes. Also disclosed are antibodies that react with the disclosed polypeptides and methods of using the antibodies to treat cancerous conditions, such as using the antibody to target cancerous cells in vivo for purposes of delivering therapeutic agents thereto. Also described are methods of diagnosing cancer using the gene sequences as well as the polypeptide sequences.