Figure 3. Expanded view of two gene clusters taken from the 1247 gene cluster diagram. A) A portion of the proliferation-associated cluster. The numbers below each breast tumor's column show the percentage of carcinoma cells in each specimen that stained positive for the Ki-67 antigen. B) Expanded view of the interferon-regulated gene cluster. The letters below each breast tumor's column identify the STAT1 staining pattern seen, with "O" representing no STAT1 staining (BC17 and Figure 4A), "W" representing weak STAT1 staining, "S" representing strong staining (BC23 and Figure 4C), "P" representing peripheral tumor cell nest staining (BC14 and Figure 4E) and "L" representing staining of lymphocytes/histiocytes only (BC16 and Figure 4G).