| Primary Identifier | MGI:3586916 | Allele Type | Targeted |
| Attribute String | Null/knockout | Gene | Fem1b |
| Transmission | Germline | Strain of Origin | 129X1/SvJ |
| Is Recombinase | false | Is Wild Type | false |
| molecularNote | A PGK-neo cassette replaced the first exon, which contains the translation initiation codon and the first two ankyrin repeats. Northern blot from mutant testis confirmed absence of transcript and Western blot of mutant brain showed absence of protein. |