title: Nucleotide sequences of immunoglobulin mu heavy chain deletion mutants.
abstract: Mutants of an IgM producing hybridoma cell line were isolated which produce mu heavy chain fragments. Two such mutants were found to have internal deletions in the mu gene and the nucleotide sequence of the deletion endpoints was determined. No evidence was found for a role of the heavy chain switch region in the formation of these deletions. The implications of these mutants in defining the requirements of immunoglobulin gene expression are discussed.
mesh_terms: D000818:Animals; D001483:Base Sequence; D002872:Chromosome Deletion; D004262:DNA Restriction Enzymes; D004926:Escherichia coli / Q000235:genetics; D006825:Hybridomas / Q000276:immunology; D007127:Immunoglobulin Constant Regions / Q000235:genetics; D007143:Immunoglobulin Heavy Chains / Q000235:genetics*; D007075:Immunoglobulin M / Q000235:genetics; D007148:Immunoglobulin mu-Chains / Q000235:genetics*; D051379:Mice; D009154:Mutation; D010957:Plasmids
chemical_list: D007127:Immunoglobulin Constant Regions; D007143:Immunoglobulin Heavy Chains; D007075:Immunoglobulin M; D007148:Immunoglobulin mu-Chains; D004262:DNA Restriction Enzymes