| Primary Identifier | MGI:2429976 | Allele Type | Targeted |
| Attribute String | Null/knockout, Reporter | Gene | Ccnb1 |
| Transmission | Germline | Strain of Origin | 129P2/OlaHsd |
| Is Recombinase | false | Is Wild Type | false |
| molecularNote | Sequence extending from within exon 5 into exon 9 was replaced by a Beta-geo cassette inserted by homologous recombination. The deleted region included the cyclin box which is involved in the binding of cell cycle division 2. |