| Primary Identifier | MGI:7484530 | Allele Type | Targeted |
| Attribute String | Modified regulatory region | Gene | Rr420 |
| Transmission | Germline | Strain of Origin | B6.Cg-Thy1<a> |
| Is Recombinase | false | Is Wild Type | false |
| molecularNote | The regulatory region sequence (TGCGGT) was replaced with a BGL II site (AGATCT) and an FRT flanked neo cassette was inserted via homologous recombination. Flp mediated recombination removed the neo cassette. |