| Primary Identifier | MGI:1888738 | Allele Type | Targeted |
| Attribute String | Null/knockout | Gene | Tcf21 |
| Transmission | Germline | Strain of Origin | 129 |
| Is Recombinase | false | Is Wild Type | false |
| molecularNote | Replacement of the first exon with a neomycin resistance cassette. |