File:T cell activation-tr.png

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Description The T lymphocyte activation pathway is triggered when a T cell encounters its cognate antigen, coupled to an MHC molecule, on the surface of an infected cell or a phagocyte. T cells contribute to immune defenses in two major ways: some direct and regulate immune responses; others directly attack infected or cancerous cells.
Date NIH Publication No. 03–5423, September 2003 (modifications: September 4, 2006)
Source The Immune System (pdf)
Author Template drawing and caption text from "The Immune System", any modifcations, made by myself are released into the public domain.
Permission
(Reusing this file)		 Original work of the US Federal Government - public domain
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This work is in the public domain in the United States because it is a work prepared by an officer or employee of the United States Government as part of that person’s official duties under the terms of Title 17, Chapter 1, Section 105 of the US Code. Note: This only applies to original works of the Federal Government and not to the work of any individual U.S. state, territory, commonwealth, county, municipality, or any other subdivision. This template also does not apply to postage stamp designs published by the United States Postal Service since 1978. (See § 313.6(C)(1) of Compendium of U.S. Copyright Office Practices). It also does not apply to certain US coins; see The US Mint Terms of Use.
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Public domain This work has been released into the public domain by its author, DO11.10. This applies worldwide.

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current21:25, 30 April 2008Thumbnail for version as of 21:25, 30 April 2008686 × 1,038 (229 KB)The cat~commonswiki (talk | contribs){{Information| |Description= The T lymphocyte activation pathway is triggered when a T cell encounters its cognate antigen, coupled to an MHC molecule, on the surface of an infected cell or a phagocyte. T cells contribute to immune defenses in two major w

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