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Antigen -- See Antigens


Substances that are recognized by the immune system and induce an immune reaction
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Antigen-Antibody Complex.   2
 

Antigen-Antibody Complexes -- See Antigen-Antibody Complex


The complex formed by the binding of antigen and antibody molecules. The deposition of large antigen-antibody complexes leading to tissue damage causes IMMUNE COMPLEX DISEASES
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Antigen-Antibody Reaction -- See Antigen-Antibody Reactions


The processes triggered by interactions of ANTIBODIES with their ANTIGENS
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  Antigen-antibody reactions -- 2 Related Subjects   2
Antigen-antibody reactions.   8
 

Antigen, Carcinoembryonic -- See Carcinoembryonic Antigen


A glycoprotein that is secreted into the luminal surface of the epithelia in the gastrointestinal tract. It is found in the feces and pancreaticobiliary secretions and is used to monitor the response to colon cancer treatment
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Antigen, CD131 -- See Cytokine Receptor Common beta Subunit


A receptor subunit that is a shared component of the INTERLEUKIN-3 RECEPTOR; the INTERLEUKIN-5 RECEPTOR; and the GM-CSF RECEPTOR. High affinity receptor complexes are formed with each of these receptors when their respective alpha subunits are combined with this shared beta subunit
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Antigen, CD1d -- See Antigens, CD1d


A major histocompatibility complex class I-like protein that contains an IMMUNOGLOBULIN C1-SET DOMAIN. It plays a unique role in the presentation of lipid ANTIGENS to NATURAL KILLER T-CELLS
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Antigen, CD20 -- See Antigens, CD20


Unglycosylated phosphoproteins expressed only on B-cells. They are regulators of transmembrane Ca2+ conductance and thought to play a role in B-cell activation and proliferation
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Antigen, CD23 -- See Receptors, IgE


Specific molecular sites on the surface of B- and T-lymphocytes which combine with IgEs. Two subclasses exist: low affinity receptors (Fc epsilon RII) and high affinity receptors (Fc epsilon RI)
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Antigen, CD26 -- See Dipeptidyl Peptidase 4


A serine protease that catalyses the release of an N-terminal dipeptide. Several biologically-active peptides have been identified as dipeptidyl peptidase 4 substrates including INCRETINS; NEUROPEPTIDES; and CHEMOKINES. The protein is also found bound to ADENOSINE DEAMINASE on the T-CELL surface and is believed to play a role in T-cell activation
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Antigen, CD261 -- See Receptors, TNF-Related Apoptosis-Inducing Ligand


Tumor necrosis factor receptor family members that are widely expressed and play a role in regulation of peripheral immune responses and APOPTOSIS. The receptors are specific for TNF-RELATED APOPTOSIS-INDUCING LIGAND and signal via conserved DEATH DOMAINS that associate with specific TNF RECEPTOR-ASSOCIATED FACTORS in the CYTOPLASM
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Antigen, CD262 -- See Receptors, TNF-Related Apoptosis-Inducing Ligand


Tumor necrosis factor receptor family members that are widely expressed and play a role in regulation of peripheral immune responses and APOPTOSIS. The receptors are specific for TNF-RELATED APOPTOSIS-INDUCING LIGAND and signal via conserved DEATH DOMAINS that associate with specific TNF RECEPTOR-ASSOCIATED FACTORS in the CYTOPLASM
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Antigen, CD264 -- See Receptors, TNF-Related Apoptosis-Inducing Ligand


Tumor necrosis factor receptor family members that are widely expressed and play a role in regulation of peripheral immune responses and APOPTOSIS. The receptors are specific for TNF-RELATED APOPTOSIS-INDUCING LIGAND and signal via conserved DEATH DOMAINS that associate with specific TNF RECEPTOR-ASSOCIATED FACTORS in the CYTOPLASM
  1
 

Antigen, CD44 -- See Hyaluronan Receptors


Acidic sulfated integral membrane glycoproteins expressed in several alternatively spliced and variable glycosylated forms on a wide variety of cell types including mature T-cells, B-cells, medullary THYMOCYTES; GRANULOCYTES; MACROPHAGES; erythrocytes, and fibroblasts. Their interaction with HYALURONIC ACID mediates binding of lymphocytes to high endothelial VENULES
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Antigen, CD66e -- See Carcinoembryonic Antigen


A glycoprotein that is secreted into the luminal surface of the epithelia in the gastrointestinal tract. It is found in the feces and pancreaticobiliary secretions and is used to monitor the response to colon cancer treatment
  1
 

Antigen, Class II -- See Histocompatibility Antigens Class II


Large, transmembrane, non-covalently linked glycoproteins (alpha and beta). Both chains can be polymorphic although there is more structural variation in the beta chains. The class II antigens in humans are called HLA-D ANTIGENS and are coded by a gene on chromosome 6. In mice, two genes named IA and IE on chromosome 17 code for the H-2 antigens. The antigens are found on B-lymphocytes, macrophages, epidermal cells, and sperm and are thought to mediate the competence of and cellular cooperation in the immune response. The term IA antigens used to refer only to the proteins encoded by the IA genes in the mouse, but is now used as a generic term for any class II histocompatibility antigen
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Antigen determinants -- See Antigenic determinants


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Antigen, HLA-B27 -- See HLA-B27 Antigen


A specific HLA-B surface antigen subtype. Members of this subtype contain alpha chains that are encoded by the HLA-B*27 allele family
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Antigen, I-A -- See Histocompatibility Antigens Class II


Large, transmembrane, non-covalently linked glycoproteins (alpha and beta). Both chains can be polymorphic although there is more structural variation in the beta chains. The class II antigens in humans are called HLA-D ANTIGENS and are coded by a gene on chromosome 6. In mice, two genes named IA and IE on chromosome 17 code for the H-2 antigens. The antigens are found on B-lymphocytes, macrophages, epidermal cells, and sperm and are thought to mediate the competence of and cellular cooperation in the immune response. The term IA antigens used to refer only to the proteins encoded by the IA genes in the mouse, but is now used as a generic term for any class II histocompatibility antigen
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Antigen, IA -- See Histocompatibility Antigens Class II


Large, transmembrane, non-covalently linked glycoproteins (alpha and beta). Both chains can be polymorphic although there is more structural variation in the beta chains. The class II antigens in humans are called HLA-D ANTIGENS and are coded by a gene on chromosome 6. In mice, two genes named IA and IE on chromosome 17 code for the H-2 antigens. The antigens are found on B-lymphocytes, macrophages, epidermal cells, and sperm and are thought to mediate the competence of and cellular cooperation in the immune response. The term IA antigens used to refer only to the proteins encoded by the IA genes in the mouse, but is now used as a generic term for any class II histocompatibility antigen
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Antigen Mimicries -- See Molecular Mimicry


The structure of one molecule that imitates or simulates the structure of a different molecule
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Antigen Mimicry -- See Molecular Mimicry


The structure of one molecule that imitates or simulates the structure of a different molecule
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Antigen Presentation.   11
Antigen Presentation -- physiology.   2
 

Antigen Presentations -- See Antigen Presentation


The process by which antigen is presented to lymphocytes in a form they can recognize. This is performed by antigen presenting cells (APCs). Some antigens require processing before they can be recognized. Antigen processing consists of ingestion and partial digestion of the antigen by the APC, followed by presentation of fragments on the cell surface. (From Rosen et al., Dictionary of Immunology, 1989)
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Antigen-Presenting Cell -- See Antigen-Presenting Cells


A heterogeneous group of immunocompetent cells that mediate the cellular immune response by processing and presenting antigens to the T-cells. Traditional antigen-presenting cells include MACROPHAGES; DENDRITIC CELLS; LANGERHANS CELLS; and B-LYMPHOCYTES. FOLLICULAR DENDRITIC CELLS are not traditional antigen-presenting cells, but because they hold antigen on their cell surface in the form of IMMUNE COMPLEXES for B-cell recognition they are considered so by some authors
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  Antigen-Presenting Cells -- 6 Related Subjects   6
Antigen presenting cells.   7
Antigen-Presenting Cells -- cytology. : Priming of T cell responses : part 1 of 2 / Victor Appay and Francesco Nicoli  2017 1
Antigen-Presenting Cells -- immunology.   3
Antigen-Presenting Cells -- physiology. : Antigen-presenting cells and the eye / edited by Manfred Zierhut, Hans-Georg Rammensee, J. Wayne Streilein  2007 1
 

Antigen Processing -- See Antigen Presentation


The process by which antigen is presented to lymphocytes in a form they can recognize. This is performed by antigen presenting cells (APCs). Some antigens require processing before they can be recognized. Antigen processing consists of ingestion and partial digestion of the antigen by the APC, followed by presentation of fragments on the cell surface. (From Rosen et al., Dictionary of Immunology, 1989)
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Antigen Processings -- See Antigen Presentation


The process by which antigen is presented to lymphocytes in a form they can recognize. This is performed by antigen presenting cells (APCs). Some antigens require processing before they can be recognized. Antigen processing consists of ingestion and partial digestion of the antigen by the APC, followed by presentation of fragments on the cell surface. (From Rosen et al., Dictionary of Immunology, 1989)
  1
 

Antigen Receptor, T-Cell -- See Receptors, Antigen, T-Cell


Molecules on the surface of T-lymphocytes that recognize and combine with antigens. The receptors are non-covalently associated with a complex of several polypeptides collectively called CD3 antigens (CD3 COMPLEX). 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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Antigen Receptors, T-Cell -- See Receptors, Antigen, T-Cell


Molecules on the surface of T-lymphocytes that recognize and combine with antigens. The receptors are non-covalently associated with a complex of several polypeptides collectively called CD3 antigens (CD3 COMPLEX). 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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Antigen Receptors, T-Cell, gamma-delta -- See Receptors, Antigen, T-Cell, gamma-delta


T-cell receptors composed of CD3-associated gamma and delta polypeptide chains and expressed primarily in CD4-/CD8- T-cells. The receptors appear to be preferentially located in epithelial sites and probably play a role in the recognition of bacterial antigens. The T-cell receptor gamma/delta chains are separate and not related to the gamma and delta chains which are subunits of CD3 (see ANTIGENS, CD3)
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Antigen recognition -- See Immune recognition


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Antigen T Cell Receptor, delta Chain -- See Receptors, Antigen, T-Cell, gamma-delta


T-cell receptors composed of CD3-associated gamma and delta polypeptide chains and expressed primarily in CD4-/CD8- T-cells. The receptors appear to be preferentially located in epithelial sites and probably play a role in the recognition of bacterial antigens. The T-cell receptor gamma/delta chains are separate and not related to the gamma and delta chains which are subunits of CD3 (see ANTIGENS, CD3)
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Antigen T Cell Receptor, gamma Chain -- See Receptors, Antigen, T-Cell, gamma-delta


T-cell receptors composed of CD3-associated gamma and delta polypeptide chains and expressed primarily in CD4-/CD8- T-cells. The receptors appear to be preferentially located in epithelial sites and probably play a role in the recognition of bacterial antigens. The T-cell receptor gamma/delta chains are separate and not related to the gamma and delta chains which are subunits of CD3 (see ANTIGENS, CD3)
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Antigenic determinant groups -- See Antigenic determinants


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  Antigenic Determinants -- 2 Related Subjects   2
Antigenic determinants. : Human blood groups : chemical and biochemical basis of antigen specificity / Helmut Schenkel-Brunner  2000 1
 

Antigenic Mimicries -- See Molecular Mimicry


The structure of one molecule that imitates or simulates the structure of a different molecule
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Antigenic Mimicry -- See Molecular Mimicry


The structure of one molecule that imitates or simulates the structure of a different molecule
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Antigenic Specificity -- See Epitopes


Sites on an antigen that interact with specific antibodies
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  Antigens -- 11 Related Subjects   11
Antigens.   20
Antigens -- administration & dosage. : Antigen delivery systems : immunological and technological issues / edited by Bruno Gander, Hans P. Merkle, and Giampietro Corradin  1997 1
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