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Absolute number of Vα2.3+ CD4+ T cells (blast gate) after 7 days of in vitro stimulation with fractionated M. tuberculosis extract and 3 days of stimulation with PHA, in an HLA-DR17(3), DQ2+ and an HLA-DR17(3)−, DQ2− donor. The short CDR3 peak length percentage of each fraction (when tested) is indicated by an open circle for the DR17+ donor.
