Electron micrographs examined of the T9-C2 cells after 4 hours' subcutaneous implantation.

Five million T9-C2 cells were injected in a subcutaneous site for 4 hours. Panel A shows 3 tumor cells, labeled A, B, and C, in various stages of swelling and death. Panel B shows a higher magnification of the central granulocyte and cell C. The arrows indicate clathrin-coated pits in cell C. Panels stained with uranyl acetate and osmium tetroxide. Original magnifications: Panel A, × 3100; Panel B, × 12 500.