| Primary Identifier | MGI:3664645 | Allele Type | Targeted |
| Attribute String | Modified regulatory region, Null/knockout | Gene | Rr101 |
| Transmission | Germline | Strain of Origin | 129S2/SvPas |
| Is Recombinase | false | Is Wild Type | false |
| molecularNote | A neomycin resistance gene replaced an 8 kb fragment containing the Cd8a cluster CIII DNaseI hypersensitivity sites CIII-1 and CIII-2. |