| Primary Identifier | MGI:1926485 | Allele Type | Targeted |
| Attribute String | Null/knockout | Gene | Igf1 |
| Transmission | Germline | Strain of Origin | 129S/SvEv-Gpi1<c> |
| Is Recombinase | false | Is Wild Type | false |
| molecularNote | Replacement of sequences encoding part of exon 4 with a neomycin resistance gene. |