| Primary Identifier | MGI:2662828 | Allele Type | Targeted |
| Attribute String | Modified regulatory region, Null/knockout | Gene | Rr320 |
| Transmission | Germline | Strain of Origin | 129X1/SvJ |
| Is Recombinase | false | Is Wild Type | false |
| molecularNote | The loxP site flanked neomycin resistance gene cassette that had replaced the 5' DNase I hypersensitive site 3 (HS3) was removed from Rr320tm1Ley ES cells via transient expression of cre recombinase and transmitted through the germline. |