Multiple gene deletions within the human immunoglobulin heavy-chain cluster.

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Multiple gene deletions within the human immunoglobulin heavy-chain cluster.

Two subjects, of 11,000 healthy individuals screened, were found to be missing three and four immunoglobulin isotypes, respectively (IgA1, IgG2, and IgG4; IgA1, IgG2, IgG4, and IgE), and have been analyzed at the DNA level by means of Southern blotting and Ig heavy-chain-specific probes. A broad deletion within the heavy-chain constant region (C) gene cluster was found on chromosome 14 of both ...

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Unusual deletions within the immunoglobulin heavy-chain locus in acute leukemias.

We have investigated the structure of the Ig heavy (IGH) chain locus in 309 cases of acute leukemia. Seventy-one cases of B-cell precursor (BCP) acute lymphoblastic leukemia (ALL) were analyzed: in six cases deletion of joining (JH) segments in the presence of cytogenetically normal chromosome 14 was observed. Similar deletions were seen in 1 out of 8 cases of biphenotypic acute leukemia analyz...

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Submicroscopic Deletions of Immunoglobulin Heavy Chain Gene (IGH) in Precursor B Lymphoblastic Leukemia with IGH Rearrangements

Translocations leading to fusions between the immunoglobulin heavy chain gene (IGH) and various partner genes have been reported in B-cell precursor acute lymphoblastic leukemia (B-ALL). However, submicroscopic deletions within IGH in B-ALL have not been rigorously assessed. In this study, we investigated characteristics of IGH submicroscopic deletions, by FISH, in B-ALL with IGH rearrangements...

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Regulation of immunoglobulin heavy-chain gene rearrangements.

Regulated assembly of antigen receptor gene segments to produce functional genes is a hallmark of B- and T-lymphocyte development. The immunoglobulin heavy-chain (IgH) and T-cell receptor beta-chain genes rearrange first in B and T lineages, respectively. Both loci require two recombination events to assemble functional genes; D-to-J recombination occurs first followed by V-to-DJ recombination....

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Evidence for multiple gene control of a single polypeptide chain: the heavy chain of rabbit immunoglobulin.

To determine the chemical basis for rabbit heavy chain allotypes, amino acid analyses were carried out on IgG and IgM antibodies isolated from rabbits which were homozygous a1 or a3 for the gamma chain locus and homozygous b4 for the light chain locus. The compositional differences between a1 and a3 IgM antibodies were found to be identical to those between their IgG counterparts. The identity ...

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ژورنال

عنوان ژورنال: Proceedings of the National Academy of Sciences

سال: 1984

ISSN: 0027-8424,1091-6490

DOI: 10.1073/pnas.81.18.5811