| Primary Identifier | MGI:4421507 | Allele Type | Targeted |
| Attribute String | Conditional ready, No functional change | Gene | Clock |
| Transmission | Germline | Strain of Origin | 129S4/SvJae |
| Is Recombinase | false | Is Wild Type | false |
| molecularNote | A floxed neo cassette containing neomycin resistance and thymidine kinase genes was inserted upstream of exon 5 and a loxp site was inserted downstream of exon 6. Transient cre expression in ES cells removed the neo cassette leaving exons 5 and 6 floxed |