Comparative analysis of CTAg-specific CD8 T cells within blood and bone marrow of a MM patient. The IFN-γ CSA was used to detect and quantify MAGE-A1289-298–specific CD8+ T cells in blood and bone marrow samples taken at the same time point. The bar chart shows the percentage frequency of MAGE-A1289-298–specific CD8+ T cells detected in blood and bone marrow (y-axis).