Tetramer expression patterns of distinct Vβ populations. Frequency and staining patterns of B8-FL8 tetramer–positive CD8⁺ T cells in subjects AC-46 (A), AC-15 (B), and AC-14 (C). Percentages indicate the frequency of tetramer-positive cells per CD8⁺ T cells (left) or the frequency of Vβ⁺ cells within the B8-FL8 tetramer–positive population (middle and top).