| Primary Identifier | MGI:1858108 | Allele Type | Targeted |
| Attribute String | Null/knockout | Gene | Brca1 |
| Transmission | Germline | Strain of Origin | 129P2/OlaHsd |
| Is Recombinase | false | Is Wild Type | false |
| molecularNote | Replacement of exons 5 and 6, encoding the zinc finger domain, with a neomycin cassette. |