| Primary Identifier | MGI:5320638 | Allele Type | Targeted |
| Attribute String | Null/knockout | Gene | Piwil4 |
| Transmission | Germline | Strain of Origin | 129P2/OlaHsd |
| Is Recombinase | false | Is Wild Type | false |
| molecularNote | A loxP site was inserted upstream of exon 17. An FRT-flanked neo cassette with a 3' loxP site was inserted downstream of exon 17. Cre-mediated recombintion removed exon 17 and the neo cassette. Immunohistochemistry confirmed the absence of protein expression in the fetal testis. |