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Allele Detail
Symbol: Ahrb-2
Name: aryl-hydrocarbon receptor; b-2 variant
MGI ID: MGI:2667355
Synonyms: Ahb-2, Ahh
Gene: Ahr  Location: Chr12:35547978-35584988 bp, - strand  Genetic Position: Chr12, 15.78 cM
Strain of Origin:  BALB/cBy
Allele Type:    Not Applicable
Mutation:    Nucleotide substitutions
Mutation detailsThis allele encodes a high affinity, heat labile, 104 kDa receptor containing 848 amino acids. Sequencing studies of cDNA from C57BL/6J congenic mice homozygous for this allele identified nucleotide substitutions in the ORF that would cause 5 amino acid differences between the C57BL/6J and BALB/cBy peptides, and 2 amino acid differences between the BALB/cBy and DBA/2J peptides. A T to C transition in exon 11 replaces the opal termination codon in the C57BL/6J allele with an arginine codon in the BALB/cBy allele. This change would extend translation of the BALB/cBy mRNA by 43 amino acids, accounting for the larger size of the peptide produced by this allele (104 kDa, vs 95 kDa for the C57BL/6J allele). (J:15153, J:22144)
Inheritance:    Codominant
View phenotypes and curated references for all genotypes (concatenated display).
Find Mice (IMSR)
Mouse strains and cell lines available from the International Mouse Strain Resource (IMSR)
Carrying this Mutation:  Mouse Strains: 21 strains available      Cell Lines: 0 lines available
Carrying any Ahr Mutation:  94 strains or lines available
C57BL/6 carries the responsive Ahrb allele; DBA/2 carries nonresponsive Ahrd. Heterozygotes (Ahrb/Ahrd) are responsive (J:5282). Later work identified a second (J:8895) and later a third (J:22144) allele conferring response. Thus the allele in C57, C58, and MA/My strains is now Ahrb-1; Ahrb-2 is carried by BALB/cBy, A, and C3H; and Ahrb-3 by Mus spretus, M. caroli, and MOLF/Ei. The nonresponsive strains AKR, DBA/2, and 129 carry Ahrd (J:22144). Nucleotide and amino acid sequence differences between Ahrb-1 and Ahrd have been determined (J:17460).

Strain of origin - this allele was found in BALB/cByJ, A/J, C3H/HeJ, CBA strains

Original:  J:8895 Poland A, et al., The murine Ah locus: a new allele and mapping to chromosome 12. Mol Pharmacol. 1987 Oct;32(4):471-8
All:  13 reference(s)

Contributing Projects:
Mouse Genome Database (MGD), Gene Expression Database (GXD), Mouse Models of Human Cancer database (MMHCdb) (formerly Mouse Tumor Biology (MTB), Gene Ontology (GO)
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MGI 6.20
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