| Primary Identifier | MGI:5553164 | Allele Type | Targeted |
| Gene | Igh | Transmission | Germline |
| Strain of Origin | C57BL/6 | Is Recombinase | false |
| Is Wild Type | false |
| molecularNote | The Switch epsilon region (the weakest switch region) was replaced with a floxed neomycin resistance cassette and the Switch mu region (the strongest switch region). Cre-mediated recombination removed the resistance cassette. |