| Primary Identifier | MGI:3664578 | Allele Type | Targeted |
| Attribute String | Null/knockout | Gene | Mr1 |
| Transmission | Germline | Strain of Origin | 129P2/OlaHsd |
| Is Recombinase | false | Is Wild Type | false |
| molecularNote | A vector was designed to delete a 1.4 kb region containing exons 2 and 3, which encode the alpha1 and alpha2 domains of the protein. Northern blot failed to detect transcript in mutant livers. |