| Primary Identifier | MGI:3790322 | Allele Type | Targeted |
| Attribute String | Null/knockout | Gene | Masp1 |
| Transmission | Germline | Strain of Origin | 129S4/SvJae |
| Is Recombinase | false | Is Wild Type | false |
| molecularNote | Exon 2 was replaced with a neo cassette. The absence of both major protein isoform products was confirmed by western blot analysis. |