| Primary Identifier | MGI:5819101 | Allele Type | Targeted |
| Attribute String | Conditional ready, No functional change | Gene | Crh |
| Transmission | Germline | Strain of Origin | 129S4/SvJae |
| Is Recombinase | false | Is Wild Type | false |
| molecularNote | A loxP site was introduced to intron 1 and a FRT-flanked neomycin cassette followed by a loxP site was placed in intron 2. Flp-mediated recombination removed the FRT-flanked neo cassette leaving exon 2 floxed. |