| Primary Identifier | MGI:2388602 | Allele Type | Targeted |
| Attribute String | Null/knockout | Gene | Per2 |
| Transmission | Germline | Strain of Origin | 129 |
| Is Recombinase | false | Is Wild Type | false |
| molecularNote | 5.5 kb of sequence encompassing the entire PAS B domain was replaced by the insertion of a neomycin selection cassette. Splicing of the remaining exons putatively generates a frameshift mutation affecting sequence downstream of exon 11. |