| Primary Identifier | MGI:1857131 | Allele Type | Targeted |
| Attribute String | Null/knockout | Gene | Ass1 |
| Transmission | Germline | Strain of Origin | 129S7/SvEvBrd-Hprt1<+> |
| Is Recombinase | false | Is Wild Type | false |
| molecularNote | A neomycin resistance cassette was inserted into exon 4 of the gene. Activity assays in liver extracts from homozygous mice demostrated the absence of the functional protein. |