Analysis of T-cell differentiation of MART-1-specific CD8 T-cell responses following immunization. A. Representative example of the expression of CD45RA and CCR7 on CD8 T cells in Pt#205 and Pt#1144. Total CD8 T cells appear in grey whereas blue dots represent MART-1-specific CD8 T cells. B. Cumulative analysis of the expression of CD45RA and CCR7 on MART-1-specific CD8 T cells in patients from the IMP321 or no IMP321 groups. All possible combinations of the distinct markers are shown on the x axis, whereas the percentages of the distinct cell subsets within MART-1-specific CD8 T cells are shown on the y axis. The pie charts summarize the data, and each slice corresponds to a certain combination of molecules. Stars (+) indicate a significant difference using a two-tailed unpaired student t test.