| Primary Identifier | MGI:1857265 | Allele Type | Targeted |
| Attribute String | Null/knockout | Gene | Twist1 |
| Transmission | Germline | Strain of Origin | 129S7/SvEvBrd-Hprt1<+> |
| Is Recombinase | false | Is Wild Type | false |
| molecularNote | A neomycin selection cassette replaced exon 1, which contains the entire coding region. |