Tumor-associated and peritoneal macrophages from 2 tumor-bearers were obtained via magnetic sorting using anti-CD11b microbeads, after which RNA was extracted and cDNA prepared from these samples. Expression of each of the listed genes was determined via quantitative real-time PCR and normalized for the housekeeping gene ribosomal protein S12. The fold induction of gene expression (mean ± SD of 2 individual mice) in tumor-associated macrophages compared with peritoneal macrophages (mean ± SD of 2 individual mice) is shown.