| Primary Identifier | MGI:4456470 | Allele Type | Targeted |
| Attribute String | Null/knockout | Gene | Gstm1 |
| Transmission | Germline | Strain of Origin | (129S/SvEv x C57BL/6)F1 |
| Is Recombinase | false | Is Wild Type | false |
| molecularNote | Exons 1 through 5 were replaced with a floxed neo cassette. |