| Primary Identifier | MGI:2386946 | 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 | This allele is derived from Rr320tm1Mgk. The 24 kb region of the gene containing 5' HS sites 1-6 flanked by loxP sites were removed by mating mutant animals to a cre-expressing line. Correct removal of the floxed sequence was confirmed by Southern blot analysis. |