B6.C-H38^c/(HW119)ByJ

Stock number: 000370
Product name: HW119
Research areas: Immunology, Inflammation and Autoimmunity Research

Detailed description

This B6/By congenic strain carries the ‘minor’ histocompatibility allele, H38^c, from BALB/cBy.

Development

Dr. Donald Bailey, then at University of California Medical Center in San Francisco, began to generate a panel of congenic lines with differential loci that determine histocompatibility by crossing BALB/cBy females with C57BL/6By males, and then backcrossing at each generation to a C57BL/6J male. At backcross generation 5 orthotopic tailskin graft tests were done to identify lines bearing BALB/cBy-derived congenic intervals with histocompatibility loci. This backcrossing, with testing, was continued until siblings at backcross generation 11 or more were intercrossed to breed the congenic interval to homozygosity and each strain was maintained by sibling inbreeding (Bailey, 1975). Dr. Bailey transferred the mice to The Jackson Laboratory when he joined the staff in 1967. The strain was cryopreserved in 1981.

Allele

Symbol: Ahr^b-2
Name: b-2 variant
MGI accession ID: MGI:2667355
Generation method: Not Applicable
Synonyms: Ah^b-2; Ah^h
Marker symbol: Ahr
Marker name: aryl-hydrocarbon receptor
Marker synonyms: Ah; Ahh; Ahre; bHLHe76; dioxin receptor; In; RP85
Chromosome: 12
Strain of origin: BALB/cBy
Molecular note: This 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).
General note: C57BL/6 carries the responsive Ahr^b allele; DBA/2 carries nonresponsive Ahr^d. Heterozygotes (Ahr^b/Ahr^d) 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 Ahr^b-1; Ahr^b-2 is carried by BALB/cBy, A, and C3H; and Ahr^b-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 Ahr^b-1 and Ahr^d have been determined (J:17460).

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

Allele

MGI accession ID: MGI:95986
Marker symbol: H38
Marker name: histocompatibility 38
Marker synonyms: H-38
Chromosome: 12