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CDR3 profiles for the Vα2.3 gene segment from an HLA-DR17(3), DQ2+ and an HLA-DR17(3)−, DQ2− blood donor upon in vitro stimulation with various M. tuberculosis (TB) antigens, PHA, and RPMI (no stimulus). Major peaks observed in the CDR3 length profiles of Vα2.3+ T cells stimulated with live M. tuberculosis or its soluble extract (SN1) in the DR17+ donor correspond to 351 bp.
