| Primary Identifier | MGI:3653700 | Allele Type | Targeted |
| Attribute String | Null/knockout | Gene | Efnb1 |
| Transmission | Germline | Strain of Origin | 129P2/OlaHsd |
| Is Recombinase | false | Is Wild Type | false |
| molecularNote | Exon 2 was removed via cre-mediated recombination. Western blot failed to detect protein in mutants. |