| Primary Identifier | MGI:3050210 | Allele Type | Targeted |
| Attribute String | Null/knockout | Gene | Mus81 |
| Transmission | Germline | Strain of Origin | 129P2/OlaHsd |
| Is Recombinase | false | Is Wild Type | false |
| molecularNote | Exons 3 and 4 were replaced with a neomycin or hygromycin selectable cassette. ES cells with successful recombination were used to create a second targeted mutation. |