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Related Concept Videos

T Cell Activation and Clonal Selection01:22

T Cell Activation and Clonal Selection

T cells are integral to our adaptive immune system, recognizing and effectively responding to foreign antigens. T cell activation and clonal selection are pivotal in orchestrating this immune response. This article elucidates these mechanisms, detailing the roles of cluster of differentiation (CD) markers, major histocompatibility complex (MHC) molecules, costimulatory signals, and the process of clonal selection.
Naive T cells that have not yet encountered an antigen express two primary CD...
Cross-reactivity00:42

Cross-reactivity

Overview
Antigens Involved in Adaptive Immunity01:26

Antigens Involved in Adaptive Immunity

An antigen is any substance the immune system identifies as foreign and potentially harmful to the body, prompting an immune response. Antigens have two functional properties: immunogenicity and reactivity. Immunogenicity is the ability of an antigen to stimulate a specific immune response. At the same time, reactivity describes the antigen's ability to react with the cells and antibodies produced in response to it.
Complete Antigens
Complete antigens possess both immunogenicity and reactivity.

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Related Experiment Video

Updated: Jun 2, 2026

Visualizing Antigen Specific CD4+ T Cells using MHC Class II Tetramers
15:42

Visualizing Antigen Specific CD4+ T Cells using MHC Class II Tetramers

Published on: March 6, 2009

CD4 allergen tetramers

W R Thomas

    Clinical and Experimental Allergy : Journal of the British Society for Allergy and Clinical Immunology
    |May 13, 2011
    PubMed
    Summary

    No abstract available in PubMed .

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