| Primary Identifier | MGI:5787576 | Allele Type | Chemically induced (ENU) |
| Attribute String | Null/knockout | Gene | Aspa |
| Inheritance Mode | Recessive | Strain of Origin | BALB/c |
| Is Recombinase | false | Is Wild Type | false |
| molecularNote | ENU mutagenesis induced a T to A point mutation that results in the amino acid substitution of a termination codon for tyrosine at position 172 (Y172X). Western blot analysis confirmed the absence of protein expression in the brain. |