| Primary Identifier | MGI:3811024 | Allele Type | Targeted |
| Attribute String | Null/knockout | Gene | Fem1b |
| Transmission | Germline | Strain of Origin | 129S6/SvEvTac |
| Is Recombinase | false | Is Wild Type | false |
| molecularNote | Exon 2 was replaced with a floxed neo cassette. The absence of protein expression was confirmed by immunohistochemistry on 14 week testes. |