| Primary Identifier | MGI:1857945 | Allele Type | Targeted |
| Attribute String | Null/knockout | Gene | Mdm2 |
| Transmission | Germline | Strain of Origin | 129S7/SvEvBrd-Hprt1<+> |
| Is Recombinase | false | Is Wild Type | false |
| molecularNote | A neomycin resistance cassette replaced two-thirds of the protein-coding sequences of the gene, including the acidic and zinc-finger domains, from amino acids 221-489. |