CD8A and neoplasm: To address this, mice bearing MT or MTGCSF−/− tumors (∼30 mm3) were injected intravenously with naïve OT-I CD8+T cells, which recognize SIINFEKL/MHCI expressed on MT and MTGCSF−/− tumor cells (Supplementary Fig. S4D and S4E; ref. 36).