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kappa (κ) chain, encoded by the immunoglobulin kappa locus (IGK@) on chromosome 2 (locus: 2p11.2) lambda (λ) chain, encoded by the immunoglobulin lambda locus (IGL@) on chromosome 22 (locus: 22q11.2) Antibodies are produced by B lymphocytes, each expressing only one class of light chain. Once set, light chain class remains fixed for the life ...
The kappa (κ) and lambda (λ) chains of the immunoglobulin light chain loci rearrange in a very similar way, except that the light chains lack a D segment. In other words, the first step of recombination for the light chains involves the joining of the V and J chains to give a VJ complex before the addition of the constant chain gene during ...
The variable region of light is therefore encoded by the rearrangement of VJ segments. The light chain can be either kappa,κ or lambda,λ. This process takes place at the level of mRNAs processing. Random rearrangements and recombinations of the gene segments at DNA level to form one kappa or lambda light chain occurs in an orderly fashion.
These chains are usually present in a 70:30 ratio of kappa to lambda. Anti-lambda light chain antibodies can nonspecifically bind to multiple isotypes of immunoglobulins. [22] Immunoglobulins will either express Kappa or Lambda light chains. This is a depiction of an immunoglobulin that expresses Lambda light chains.
The chromosomal region that encodes an antibody is large and contains several distinct gene loci for each domain of the antibody—the chromosome region containing heavy chain genes is found on chromosome 14, and the loci containing lambda and kappa light chain genes (IGL@ and IGK@) are found on chromosomes 22 and 2 in humans. One of these ...
Protein L binding is restricted to those antibodies that contain kappa light chains. In humans and mice, most antibody molecules contain kappa (κ) light chains and the remainder have lambda (λ) light chains. Protein L is only effective in binding certain subtypes of kappa light chains.
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