| Primary Identifier | MGI:5297544 | Allele Type | Targeted |
| Attribute String | Not Specified | Gene | Ighm |
| Transmission | Germline | Strain of Origin | B6.Cg-Thy1<a> |
| Is Recombinase | false | Is Wild Type | false |
| molecularNote | A C to T point mutation was introduced into the gene coding for the third C domain of the mu-heavy chain causing the amino acid encoded by codon 436 to change from proline to serine. A floxed neomycin was inserted as well. This neo cassette was subsequently excised from correctly targeted mice. |