| Primary Identifier | MGI:3579849 | Allele Type | Targeted |
| Attribute String | Null/knockout | Gene | Tbx20 |
| Transmission | Germline | Strain of Origin | 129S6/SvEvTac |
| Is Recombinase | false | Is Wild Type | false |
| molecularNote | Exon 2 was removed via cre-mediated recombination. RT-PCR analysis of mutant heart detected a new, shorter transcript resulting from the stop codon in exon 3 that was created by the excision of exon 2. |