bild2_19

bild2_19 - BILD 2: Multicellular Life LECTURE #19 Website:

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BILD 2: Multicellular Life LECTURE #19 Website: http://www.biology.ucsd.edu/classes/bild2.WI11.1 Instructor: Darwin K. Berg (dberg@ucsd.edu) ANNOUNCEMENTS: 1) Second midterms (those remaining): available in the box on the 3rd floor of Pacific Hall in the foyer across from the elevators, if you signed the release on p. 1. If not, try 3100E between 1 & 3 pm on M-F. 2) Regrades, point re-counts, etc. - check with the relevant TA before the end of Fri, Feb 25. (And first check the Key on the web to identify the TA, the appropriate answers, and so forth.)
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Fig. 43-9: Antigen Receptors on Lymphocytes Antigen- binding site Antigen- binding site Antigen- binding site Disulfide bridge Variable regions Constant regions Transmembrane region Plasma membrane Light chain Heavy chains T cell ! chain " chain Disulfide bridge Cytoplasm of T cell (b) T cell receptor consisting of one ! chain and one " chain linked by a disulfide bridge. Cytoplasm of B cell (a) B cell receptor consisting of two identical heavy chains and two identical light chains linked by several disulfide bridges. B cell V C CC V V
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Fig. 43-11: Antigen Presentation by an MHC Molecule Antigen Top view: binding surface exposed to antigen receptors Plasma membrane of infected cell Antigen Class I MHC molecule
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Fig. 43-12: The Interaction of T Cells with Antigen-Presenting Cells
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bild2_19 - BILD 2: Multicellular Life LECTURE #19 Website:

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