| Primary Identifier | MGI:2388068 | Allele Type | Targeted |
| Attribute String | Null/knockout | Gene | Igh-J |
| Transmission | Germline | Strain of Origin | 129P2/OlaHsd |
| Is Recombinase | false | Is Wild Type | false |
| description | This allele is used in the Xenomouse strains. |
| molecularNote | The entire Igh-J region and a flanking DQ52 gene segment was deleted and replaced with a neomycin resistance gene via homologous recombination. Homozygous mutant animals were confirmed by Southern blot analysis. |