FOXP3 and neoplasm: (C) Representative fluorescence micrographs of tumor sections from Foxp3-eGFP wild-type (WT) (phosphate-buffered saline (PBS), n = 4; GW4869, n = 6) and Foxp3-eGFP Cd300a−/−- mice (PBS, n = 5; GW4869, n = 6) in the absence or presence of GW4869, and stained with an anti-GFP mAb (green) and the DNA-binding dye 4′,6-diamidino-2-phenylindole (DAPI, left).