| Primary Identifier | MGI:2181205 | Allele Type | Targeted |
| Attribute String | Null/knockout | Gene | Cry1 |
| Transmission | Germline | Strain of Origin | 129P2/OlaHsd |
| Is Recombinase | false | Is Wild Type | false |
| molecularNote | A neomycin selection cassette replaced coding sequence corresponding to base pairs 730 through 1479 in the cDNA sequence. RT-PCR followed by Southern blot analysis, using the complete cDNA as a probe, confirmed a lack of transcript in homozygous mutant mice. |