| Primary Identifier | MGI:4946281 | Allele Type | Targeted |
| Gene | Ttr | Transmission | Germline |
| Strain of Origin | (C57BL/6NCrlj x CBA/JNCrlj)F1 | Is Recombinase | false |
| Is Wild Type | false |
| molecularNote | Using Ttrtm1Kymm, the neo cassette is replaced with a replacement vector consisting of an IRES, a wild-type human TTR cDNA, and a FRT-flanked puromycin resistance gene flanked by a lox66 and a loxP site. Flp-mediated recombination removed the puro cassette. |