| Primary Identifier | MGI:2386945 | Allele Type | Targeted |
| Attribute String | Modified regulatory region, Null/knockout | Gene | Rr320 |
| Transmission | Germline | Strain of Origin | 129 |
| Is Recombinase | false | Is Wild Type | false |
| molecularNote | The 5' DNase hypersensitive site 1 (HS1) of the gene was replaced with a loxP site flanked neomycin resistance gene cassette and HS 4-6 were replaced with a loxP site flanked hygromycin resistance gene cassette and a partial neo cassette via homologous recombination. |