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Representative pattern of CD4+ T-cell IL-2 secretion in response to PE38-derived peptides in a single donor. (A) IL-2 secretion in response to stimulation with 22 peptide pools from PE38. (B) IL-2 response to the five peptides that comprise pool 3. (C) IL-2 response of isolated CD4+ T cells to the five peptides that comprise pool 3.
