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KW - Foreign lipid antigens presented

KW - Self lipid antigens

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T1 - Biosynthesis and processing of murine T-cell antigen receptor

The epithelial cells at this location (the 'M' or microfold cells) are often thinner than those at other secretory sites, in order to enable efficient passage of antigens.

BT - Antigen Presenting Cells: From Mechanisms to Drug Development

Frozen tissue sections are used, stained with immunoperoxidase techniques including markers for MHC class II antigens or specific markers, as indicated above.

Antihypertensive and cardioprotective effects of pumpkin seed oil.

The Brucella melitensis 16M LPS O-antigen is a homopolymer of 4-formamido-4,6, dideoxymannose.

For B lymphocytes, an immunoglobulin molecule that recognizes nominal antigen; for T lymphocytes, a T-cell receptor molecule that recognizes antigenic peptide in combination with the polymorphic determinant of an MHC molecule Antinuclear antibody.

interferon gamma); others are follicular dendritic cells, not of bone-marrow origin, which present antigen in the form of immune complexes to B cells in germinal centres of peripheral lymphoid tissue; marginal zone macrophages in splenic marginal zone, which present antigen, without contact with T helper cells, to B cells at this location (T cell-independent response, e.g.

Structures of mammalian lipids.

Structures of microbial lipids.

Both primary and secondary antibody responses, however, are valuable for evaluating the intrinsic naive and memory immune capacity of individuals, although secondary responses are less sensitive to immunological insults.

Primary responses, like those to keyhole limpet haemocyanin antigen, are considered to be more sensitive than secondary responses, like those to tetanus toxoid.

of distilled water can produce an antihelminthic effect.
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  • Primary and secondary IgG and IgM responses to antigen; or, 2.

    Their implication in O-antigen translocation across the inner membrane was confirmed by gene replacement.

  • Since the amount of antibody Table 10.

    They usually produce Shiga toxin (Stx) 1 and/or Stx2, and express H7-flagella antigen (or nonmotile).

  • Another widely used T cell-dependent antigen is ovalbumin.

    Brigl M and Brenner MB (2004) CD1: antigen presentation and T cell function. Annual Review of Immunology 22: 817–890.

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Many systems can be used, depending on the antigen.

The antigen-specific receptor of C6VL T-lymphoma cells is a disulfide-linked heterodimer composed of 39 kd α chain and a 41 kd β chain, both of which exhibit charge microheterogeneity. Pulse-chase labeling experiments indicate that epitopes reactive with the anti-receptor xenoantiserum #8177 were detectable by 2 min, while the clonotypic epitope reactive with monoclonal antibody 124-40 was not detectable until 10 min. Digestion with endoglycosidases H and F revealed that both subunits have at least three N-linked oligosaccharide side chains. The deglycosylated α and β subunits were 27 and 32 kd, respectively. These data suggest that the dimeric receptor is formed shortly after translation, followed by extensive glycosylation. Emergence of the C6VL clonotypic epitope, and perhaps the antigen binding site, may therefore be dependent on post-assembly events.

against sheep or rabbit red blood cells) and antistreptolysin.

N2 - Phosphoglyceride-linked enterobacterial common antigen (ECAPG) is a cell surface glycolipid that is synthesized by all gram-negative enteric bacteria. The carbohydrate portion of ECAPG consists of linear heteropolysaccharide chains comprised of the trisaccharide repeat unit Fuc4NAc-ManNAcA-GlcNAc, where Fuc4NAc is 4-acetamido-4,6-dideoxy-D-galactose, ManNAcA is N-acetyl-D-mannosaminuronic acid, and GlcNAc is N-acetyl-D-glucosamine. The potential reducing terminal GlcNAc residue of each polysaccharide chain is linked via phosphodiester linkage to a phosphoglyceride aglycone. We demonstrate here the occurrence of a watersoluble cyclic form of enterobacterial common antigen, ECACYC, purified from Escherichia coli strains B and K-12 with solution nuclear magnetic resonance (NMR) spectroscopy, electrospray ionization mass spectrometry (ESI-MS), and additional biochemical methods. The ECACYC molecules lacked an aglycone and contained four trisaccharide repeat units that were nonstoichiometrically substituted with up to four O-acetyl groups. ECACYC was not detected in mutant strains that possessed null mutations in the wecA, wecF, and wecG genes of the wec gene cluster. These observations corroborate the structural data obtained by NMR and ESI-MS analyses and show for the first time that the trisaccharide repeat units of ECACYC and ECAPG are assembled by a common biosynthetic pathway.

In this test, lymphocytes can be activated by antigens (e.g.

Glycolipids and phospholipids are major components of biomembranes (lipid bilayers) in which hydrophobic tail groups aggregate and form micelles with head groups facing towards the outside membrane. Glycolipids and phospholipids play important roles in intracellular vesicular trafficking; for example, in the endoplasmic reticulum.

Multichain molecule on lymphocytes, to which antigens bind.

N2 - The antigen-specific receptor of C6VL T-lymphoma cells is a disulfide-linked heterodimer composed of 39 kd α chain and a 41 kd β chain, both of which exhibit charge microheterogeneity. Pulse-chase labeling experiments indicate that epitopes reactive with the anti-receptor xenoantiserum #8177 were detectable by 2 min, while the clonotypic epitope reactive with monoclonal antibody 124-40 was not detectable until 10 min. Digestion with endoglycosidases H and F revealed that both subunits have at least three N-linked oligosaccharide side chains. The deglycosylated α and β subunits were 27 and 32 kd, respectively. These data suggest that the dimeric receptor is formed shortly after translation, followed by extensive glycosylation. Emergence of the C6VL clonotypic epitope, and perhaps the antigen binding site, may therefore be dependent on post-assembly events.

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