Image:T cell activation.jpg

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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.

Source

The Immune System (pdf)

Date

NIH Publication No. 03–5423, September 2003 (modifications: September 4, 2006)

Author

Template drawing and caption text from "The Immune System", any modifcations, made by myself are released into the public domain.

Permission

Original work of the US Federal Government - public domain

Public domain This work is in the public domain in the United States because it is a work of the United States Federal Government under the terms of Title 17, Chapter 1, Section 105 of the US Code. See Copyright.

Note: This only applies to works of the Federal Government and not to the work of any individual U.S. state, territory, commonwealth, county, municipality, or any other subdivision.


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