| Primary Identifier | MGI:4836663 | Allele Type | Targeted |
| Attribute String | Modified regulatory region | Gene | Rr152 |
| Transmission | Germline | Strain of Origin | 129P2/OlaHsd |
| Is Recombinase | false | Is Wild Type | false |
| molecularNote | A loxP site flanked neomycin resistance gene cassette replaced the entire 3' regulatory region (3'RR, located downstream of the Ighc gene segments)(Rr152), which contains the enhancers hs3a (Rr154), hs1,2 (Rr153), hs3b (Rr155) and hs4 (Rr156). Cre-mediated recombination removed the neo cassette. |