| Primary Identifier | MGI:1857695 | Allele Type | Targeted |
| Attribute String | Null/knockout | Gene | Smad3 |
| Transmission | Germline | Strain of Origin | 129S6/SvEvTac |
| Is Recombinase | false | Is Wild Type | false |
| molecularNote | A neomycin resistance cassette replaced exon 8 of the gene, which truncated the protein 89 amino acids from the C-terminal end. |