File: T cell activation.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.
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
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 19:44, 6 May 2007 | | 686 × 1,038 (232 KB) | Rick Swarts (talk | contribs) | [http://en.wikipedia.org/wiki/Image:T_cell_activation.png source and rights] |
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