| Primary Identifier | MGI:2445955 | Allele Type | Targeted |
| Attribute String | Null/knockout | Gene | Astn1 |
| Transmission | Germline | Strain of Origin | (129X1/SvJ x 129S1/Sv)F1-Kitl<+> |
| Is Recombinase | false | Is Wild Type | false |
| molecularNote | The 168 bp exon containing the translational start codon was replaced with a neomycin selection cassette inserted by homologous recombination. No protein was detected by Western blot analysis of homozygous mutant mice. |