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2. Immunoglobulin A - Wikipedia

   en.wikipedia.org/wiki/Immunoglobulin_A

   Immunoglobulin A (Ig A, also referred to as sIgA in its secretory form) is an antibody that plays a role in the immune function of mucous membranes. The amount of IgA produced in association with mucosal membranes is greater than all other types of antibody combined. [3]

3. Isotype (immunology) - Wikipedia

   en.wikipedia.org/wiki/Isotype_(immunology)

   The IgG, IgE and IgA antibody isotypes are generated following class-switching during germinal centre reaction and provide different effector functions in response to specific antigens. IgG is the most abundant antibody class in the serum and it is divided into 4 subclasses based on differences in the structure of the constant region genes and ...

4. Antibody - Wikipedia

   en.wikipedia.org/wiki/Antibody

   Each antibody binds to a specific antigen in a highly specific interaction analogous to a lock and key.. An antibody (Ab) or immunoglobulin (Ig) is a large, Y-shaped protein belonging to the immunoglobulin superfamily which is used by the immune system to identify and neutralize antigens such as bacteria and viruses, including those that cause disease.

5. Selective immunoglobulin A deficiency - Wikipedia

   en.wikipedia.org/wiki/Selective_immunoglobulin_A...

   People with this deficiency lack immunoglobulin A (IgA), a type of antibody that protects against infections of the mucous membranes lining the mouth, airways, and digestive tract. It is defined as an undetectable serum IgA level in the presence of normal serum levels of IgG and IgM, in persons older than 4 years. It is the most common of the ...

6. Anti-immunoglobulin - Wikipedia

   en.wikipedia.org/wiki/Anti-immunoglobulin

   Specifically, anti-immunoglobulin antibodies are created by B-cells as antibodies to bind to other immunoglobulins. Immunoglobulins have two regions: the constant region and the variable region. The constant region is involved in effector function, while the variable region is involved in recognizing and binding to antigens .

7. J chain - Wikipedia

   en.wikipedia.org/wiki/J_chain

   Schematic of immunoglobulin A dimer showing H-chain (blue), L-chain (red), J-chain (magenta) and secretory component (yellow). The Joining (J) chain is a protein component that links monomers of antibodies IgM and IgA to form polymeric antibodies capable of secretion. [5]

8. Immunoglobulin class switching - Wikipedia

   en.wikipedia.org/wiki/Immunoglobulin_class_switching

   Mechanism of class-switch recombination that allows isotype switching in activated B cells. Immunoglobulin class switching, also known as isotype switching, isotypic commutation or class-switch recombination (CSR), is a biological mechanism that changes a B cell's production of immunoglobulin from one type to another, such as from the isotype IgM to the isotype IgG. [1]

9. Allotype (immunology) - Wikipedia

   en.wikipedia.org/wiki/Allotype_(immunology)

   In immunology, allotype is an immunoglobulin variation (in addition to isotypic variation) that can be found among antibody classes and is manifested by heterogeneity of immunoglobulins present in a single vertebrate species. The structure of immunoglobulin polypeptide chain is dictated and controlled by number of genes encoded in the germ line ...