Immunoglobulin allotype

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The allotype affects the constant region (labeled CL and CH1-3 in the diagram.)

In immunology, an immunoglobulin allotype is the allele of the antibody chains found in the individual.

To reduce risk of transplant rejection, tissue typing is used to try to match donors and recipients with the same or similar allotypes.

The most important types are Gm (heavy chain) and Km (light chain).

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v • d • e Immune system / Immunology
Systems	Adaptive immune system vs. Innate immune system • Humoral immune system vs. Cellular immune system • Complement system (Anaphylatoxins) • Intrinsic immune system
Antibodies and antigens	Antibody (Monoclonal antibodies, Polyclonal antibodies, Autoantibody) • Allotype • Isotype • Idiotype • Antigen (Superantigen)
Immune cells	White blood cells (T cell, B cell, NK cell, Mast cell, Basophil, Eosinophil) • Phagocyte (Neutrophil, Macrophage, Dendritic cell) • Antigen-presenting cell • Reticuloendothelial system
Immunity vs. tolerance	Immunity • Autoimmunity • Allergy • Tolerance (Central) • Immunodeficiency
Immunogenetics	Somatic hypermutation • V(D)J recombination • Immunoglobulin class switching • MHC / HLA
Substances	Cytokines • Opsonin • Cytolysin
Other	Inflammation • Epitope (Hapten) • Cross-reactivity