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Phenotypes Associated with This Genotype
Genotype
MGI:4352688
Allelic
Composition
Rag2tm1Cgn/Rag2tm1Cgn
Xrcc4tm1Fwa/Xrcc4tm2Fwa
Tg(Cr2-cre)3Cgn/?
Genetic
Background
involves: 129P2/OlaHsd * 129S6/SvEvTac * C57BL/6
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Rag2tm1Cgn mutation (2 available); any Rag2 mutation (115 available)
Tg(Cr2-cre)3Cgn mutation (2 available)
Xrcc4tm1Fwa mutation (0 available); any Xrcc4 mutation (27 available)
Xrcc4tm2Fwa mutation (0 available); any Xrcc4 mutation (27 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
cellular
• genomic stability is disrupted in activated B cells with chromosome breakage occurring in close to half of cells
• B cells undergoing class switch recombination have even greater increased risk of chromosome breakage due to aberrations at the Igh locus
• there is decreased breakage at Igl locus compared to conditional knockouts on a Rag-sufficient background

hematopoietic system
• class switch recombination often leads to chromosome breakage at the Igh locus

immune system
• class switch recombination often leads to chromosome breakage at the Igh locus


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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last database update
01/06/2026
MGI 6.24
The Jackson Laboratory