alexa Evidence that a single peptide-MHC complex on a target cell can elicit a cytolytic T cell response.
Immunology

Immunology

Journal of Clinical & Cellular Immunology

Author(s): Sykulev Y, Joo M, Vturina I, Tsomides TJ, Eisen HN

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Abstract Using a chemically homogeneous radiolabeled peptide of high specific activity (125I-QLSPYPFDL, 3.5 x 10(18) cpm per mole) we show that at a peptide concentration (5 pM) causing half-maximal lysis of target cells by a cytolytic T lymphocyte (CTL) clone that recognizes the peptide in association with Ld, a class I MHC protein, only 3 peptide molecules on average are bound by Ld per target cell. From the distribution of Ld on the target cells, we suggest that a single peptide-MHC complex per target cell can trigger activation of the T cell cytolytic response.
This article was published in Immunity and referenced in Journal of Clinical & Cellular Immunology

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