title: Allotypic differences in murine mu genes.
abstract: We report the complete DNA sequence of a c-DNA clone of the heavy chain mu b allele of the C57BL/6 mouse. Comparisons have been made with the nucleotide sequences of the germ line BALB/c mu a and the plasmacytoma TEPC-183 mu a alleles reported elsewhere over the entire length of the coding and the 3' untranslated region. In contrast to the extensive differences between the gamma 2a a and b alleles we have reported earlier we see a very high degree of homology between the mu alleles. Only one of the nucleotide differences between C57BL/6 mu b and BALB/c mu a leads to an amino acid substitution. This single amino acid exchange must form the allotypic determinant of the mu b allele. A comparison of four different DNA sequences indicates that they are all distinct IgM alleles.
authors.forename: P H
authors.initials: PH
authors.lastname: Schreier
authors.forename: S
authors.initials: S
authors.lastname: Quester
authors.forename: A
authors.initials: A
authors.lastname: Bothwell
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D003062:Codon; D005796:Genes; D007126:Immunoglobulin Allotypes / Q000235:genetics*; D007143:Immunoglobulin Heavy Chains / Q000235:genetics*; D007148:Immunoglobulin mu-Chains / Q000235:genetics*; D051379:Mice; D008807:Mice, Inbred BALB C; D008810:Mice, Inbred C57BL
chemical_list: D003062:Codon; D007126:Immunoglobulin Allotypes; D007143:Immunoglobulin Heavy Chains; D007148:Immunoglobulin mu-Chains