| Primary Identifier | MGI:4461000 | Allele Type | Targeted |
| Attribute String | Null/knockout | Gene | Mir140 |
| Transmission | Germline | Strain of Origin | (C57BL/6NCrlj x CBA/JNCrlj)F1 |
| Is Recombinase | false | Is Wild Type | false |
| molecularNote | The entire pre-microRNA sequence was replaced with a floxed neo cassette. Cre mediated recombination removed the neo cassette. QPCR confirmed the absence of transcript expression in E11.5 embryo extracts. |