| Primary Identifier | MGI:4437126 | Allele Type | Targeted |
| Gene | Ighm | Transmission | Germline |
| Strain of Origin | 129P2/OlaHsd | Is Recombinase | false |
| Is Wild Type | false |
| molecularNote | The human alpha 1 heavy chain was inserted into the Imu CH intron replacing Smu. A floxed neo cassette inserted downstream of the inserted sequence was removed by cre mediated recombination. |