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Receptors antigen t-cell

receptors, antigen, T-cell

molecules on the surface of t-lymphocytes that recognise and combine with antigens. The receptors are non-covalently associated with a complex of several polypeptides collectively called cD3 antigens (antigens, CD3). Recognition of foreign antigen and the major histocompatibility complex is accomplished by a single heterodimeric antigen-receptor structure, composed of either alpha-beta (receptors, antigen, T-cell, alpha-beta) or gamma-delta (receptors, antigen, T-cell, gamma-delta) chains.


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Difference between T-Cell and Phagocyte?

phagocytes like macrophages have general receptors to recognize some pathogens, and engulf them whole. T cells recognize the antigens, which is only part of the pathogen, but the antigen has to be presented on the host cells. ...

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by david23
Wed May 16, 2007 3:52 pm
 
Forum: Physiology
Topic: Difference between T-Cell and Phagocyte?
Replies: 6
Views: 7030

Epitopes and antigen-receptor formation

... appropriate board - What is the difference between an epitope and an antigen? Would I be correct in assuming that an epitope is a small, more specific portion of the (larger sized) antigen? Also, where do antigen receptors and antibodies actually come from ? I'm referring specifically ...

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by Jedi of Zen
Wed Apr 12, 2006 5:16 am
 
Forum: Human Biology
Topic: Epitopes and antigen-receptor formation
Replies: 2
Views: 803

Specific memory in Innate Immune System

(1) Lectin is the simplest antigen recognition system in organisms, it can discriminate self vs nonself molecules based on pattern-recognition mechanism, before receptor is developed. When receptors are available, the organisms will use PRRs. For instance, Amoeba discriminates ...

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by Dr.Stein
Fri Jan 27, 2006 7:03 am
 
Forum: Physiology
Topic: Specific memory in Innate Immune System
Replies: 42
Views: 5515

Killer T and Cancerous cells.

Yup, und immunologically, we we call it as non-self . CD4+ and CD8+ antigen receptors know the difference between self and non-self.

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by victor
Sun Dec 11, 2005 1:58 pm
 
Forum: Physiology
Topic: Killer T and Cancerous cells.
Replies: 14
Views: 2254

Killer T and Cancerous cells.

simply said that cancerous cells doesn't have the self antigen anymore...so Tc cells (Tc = T-cytotoxic) will get rid of it as soon as ... yes, NK cells are different from Tc cells ecause NK cells do not have CD3 receptors like TC cells do..

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by victor
Wed Dec 07, 2005 1:04 pm
 
Forum: Physiology
Topic: Killer T and Cancerous cells.
Replies: 14
Views: 2254


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