Micro 03-31-08 - Whitney Barter Ch. 17 R 3-7, 10 3/31/08 3....

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Whitney Barter Ch. 17 – R 3-7, 10 3/31/08 3. For what does MHC stand? What is the function of MHC? What types of T cells interact with MHC class I? With MHC class II? MHC stands for Major Histocompatability Complex and they are self antigens. T H cells react with MHC II cells; T C cells react with MHC I cells 4. Explain what an antigen is. Distinguish an antigen from an epitope and from a hapten. An antigen is a chemical substance that causes the body to produce specific antibodies and can combine with these antibodies. A hapten is a low-molecular-weight substance that is not antigenic unless it is attached to a carrier molecule. Once an antibody has been formed against the hapten, the hapten alone will react with the antibodies independently of its carrier. 5. Explain what an anti body is by describing the characteristics of antibodies. Diagram the structure of a typical antibody: label the heavy chain, light chain, and constant, variable, and F C regions. An antibody is a protein produced by the body in response to the presence of an antigen;
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Micro 03-31-08 - Whitney Barter Ch. 17 R 3-7, 10 3/31/08 3....

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