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Flow cytometric kinetic analysis of T cell stimulation by SElU2. Time courses of Vβ 13.2 (A) and Vβ 14 (B) expression in blast cells (closed circles) and small cells (open circles), identified with forward scatter/side scatter criteria, after stimulation of PBMC with 500 ng/ml SElU2 are shown. Vβ expansion was determined by flow cytometry. Data are percentages of CD3 T cells expressing the corresponding Vβ chains.
