| Primary Identifier | MGI:5752251 | Allele Type | Targeted |
| Gene | Igh | Transmission | Germline |
| Strain of Origin | 129S6/SvEvTac | Is Recombinase | false |
| Is Wild Type | false |
| molecularNote | In intergenic control region 1 (IGCR1) the first CCCTC-binding factor (CTCF)-binding element (CBE1) was replaced with scrambled sequence that does not bind CTCF. A floxed neo cassette was also inserted between the two CBEs and subsequently removed by cre mediated recombination. |