| Primary Identifier | MGI:7711348 | Allele Type | Endonuclease-mediated |
| Attribute String | Modified regulatory region | Gene | Rr152 |
| Transmission | Germline | Strain of Origin | 129S2/SvPas |
| Is Recombinase | false | Is Wild Type | false |
| molecularNote | The entire 30.3 kb 3'RR Igh super-enhancer was replaced with a 2.1 kb region comprising only the four core enhancers (hs3a (Rr154), hs1.2 (Rr153), hs3b (Rr155) and hs4 (Rr156) and a loxP site flanked neomycin resistance gene cassette using sgRNAs with CRISPR/Cas9 technology. The neo cassette was removed through subsequent Cre-mediated recombination. |