| Primary Identifier | MGI:2445756 | Allele Type | Targeted |
| Attribute String | Null/knockout | Gene | Ighm |
| Transmission | Germline | Strain of Origin | 129S4/SvJae |
| Is Recombinase | false | Is Wild Type | false |
| molecularNote | The floxed neo cassette that replaced the endogenous splice donor site was excised from Igh-6tm2Che via in vivo cre mediated recombination. No transcript was detected by Northern blot analysis of homozygous mutant mice. |