Immunoglobulin heavy chain gene organization in mice: analysis of a myeloma genomic clone containing variable and alpha constant regions. 1979

P W Early, and M M Davis, and D B Kaback, and N Davidson, and L Hood

We have isolated a myeloma genomic DNA clone containing the variable and constant regions of a mouse alpha chain. Restriction enzyme analyses and electron microscopic R loop mapping have demonstrated that the variable region is separated from the constant region by 6.8 kilobases of intervening DNA. In addition, two intervening DNA sequences of 100--200 bases separate the constant region into three approximately equal units. These intervening sequences may separate each of the segments coding for the three constant region domains of the alpha heavy chain. Southern blot analysis of embryo and myeloma DNA suggests that DNA rearrangement of heavy chain variable and constant regions occurs during the differentiation of antibody-producing cells.

UI MeSH Term Description Entries
D007127 Immunoglobulin Constant Regions The domains of the immunoglobulin molecules that are invariable in their amino acid sequence within any class or subclass of immunoglobulin. They confer biological as well as structural functions to immunoglobulins. One each on both the light chains and the heavy chains comprises the C-terminus half of the IMMUNOGLOBULIN FAB FRAGMENT and two or three of them make up the rest of the heavy chains (all of the IMMUNOGLOBULIN FC FRAGMENT) Ig Constant Regions,Immunoglobulin Constant Region,Constant Region, Ig,Constant Region, Immunoglobulin,Constant Regions, Ig,Constant Regions, Immunoglobulin,Regions, Ig Constant
D007135 Immunoglobulin Variable Region That region of the immunoglobulin molecule that varies in its amino acid sequence and composition, and comprises the binding site for a specific antigen. It is located at the N-terminus of the Fab fragment of the immunoglobulin. It includes hypervariable regions (COMPLEMENTARITY DETERMINING REGIONS) and framework regions. Variable Region, Ig,Variable Region, Immunoglobulin,Framework Region, Immunoglobulin,Fv Antibody Fragments,Fv Fragments,Ig Framework Region,Ig Variable Region,Immunoglobulin Framework Region,Immunoglobulin Fv Fragments,Immunoglobulin V,Antibody Fragment, Fv,Antibody Fragments, Fv,Fragment, Fv,Fragment, Fv Antibody,Fragment, Immunoglobulin Fv,Fragments, Fv,Fragments, Fv Antibody,Fragments, Immunoglobulin Fv,Framework Region, Ig,Framework Regions, Ig,Framework Regions, Immunoglobulin,Fv Antibody Fragment,Fv Fragment,Fv Fragment, Immunoglobulin,Fv Fragments, Immunoglobulin,Ig Framework Regions,Ig Variable Regions,Immunoglobulin Framework Regions,Immunoglobulin Fv Fragment,Immunoglobulin Variable Regions,Regions, Immunoglobulin Variable,Variable Regions, Ig,Variable Regions, Immunoglobulin
D007137 Immunoglobulin alpha-Chains The class of heavy chains found in IMMUNOGLOBULIN A. They have a molecular weight of approximately 58 kDa and contain about 470 amino acid residues arranged in four domains and an oligosaccharide component bound covalently to their Fc fragment constant region. Ig alpha Chains,Immunoglobulins, alpha-Chain,Immunoglobulin alpha-Chain,alpha-Chain Immunoglobulins,alpha-Immunoglobulin Heavy Chain,alpha-Immunoglobulin Heavy Chains,Chains, Ig alpha,Heavy Chain, alpha-Immunoglobulin,Heavy Chains, alpha-Immunoglobulin,Immunoglobulin alpha Chain,Immunoglobulin alpha Chains,Immunoglobulins, alpha Chain,alpha Chain Immunoglobulins,alpha Chains, Ig,alpha Immunoglobulin Heavy Chain,alpha Immunoglobulin Heavy Chains,alpha-Chain, Immunoglobulin,alpha-Chains, Immunoglobulin
D007143 Immunoglobulin Heavy Chains The largest of polypeptide chains comprising immunoglobulins. They contain 450 to 600 amino acid residues per chain, and have molecular weights of 51-72 kDa. Immunoglobulins, Heavy-Chain,Heavy-Chain Immunoglobulins,Ig Heavy Chains,Immunoglobulin Heavy Chain,Immunoglobulin Heavy Chain Subgroup VH-I,Immunoglobulin Heavy Chain Subgroup VH-III,Heavy Chain Immunoglobulins,Heavy Chain, Immunoglobulin,Heavy Chains, Ig,Heavy Chains, Immunoglobulin,Immunoglobulin Heavy Chain Subgroup VH I,Immunoglobulin Heavy Chain Subgroup VH III,Immunoglobulins, Heavy Chain
D008970 Molecular Weight The sum of the weight of all the atoms in a molecule. Molecular Weights,Weight, Molecular,Weights, Molecular
D009194 Myeloma Proteins Abnormal immunoglobulins characteristic of MULTIPLE MYELOMA. M Components,Proteins, Myeloma
D004274 DNA, Recombinant Biologically active DNA which has been formed by the in vitro joining of segments of DNA from different sources. It includes the recombination joint or edge of a heteroduplex region where two recombining DNA molecules are connected. Genes, Spliced,Recombinant DNA,Spliced Gene,Recombinant DNA Research,Recombination Joint,DNA Research, Recombinant,Gene, Spliced,Joint, Recombination,Research, Recombinant DNA,Spliced Genes
D004622 Embryo, Mammalian The entity of a developing mammal (MAMMALS), generally from the cleavage of a ZYGOTE to the end of embryonic differentiation of basic structures. For the human embryo, this represents the first two months of intrauterine development preceding the stages of the FETUS. Embryonic Structures, Mammalian,Mammalian Embryo,Mammalian Embryo Structures,Mammalian Embryonic Structures,Embryo Structure, Mammalian,Embryo Structures, Mammalian,Embryonic Structure, Mammalian,Embryos, Mammalian,Mammalian Embryo Structure,Mammalian Embryonic Structure,Mammalian Embryos,Structure, Mammalian Embryo,Structure, Mammalian Embryonic,Structures, Mammalian Embryo,Structures, Mammalian Embryonic
D005796 Genes A category of nucleic acid sequences that function as units of heredity and which code for the basic instructions for the development, reproduction, and maintenance of organisms. Cistron,Gene,Genetic Materials,Cistrons,Genetic Material,Material, Genetic,Materials, Genetic
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia

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