| Primary Identifier | MGI:4459503 | Allele Type | Targeted |
| Attribute String | Null/knockout | Gene | Igf1 |
| Transmission | Germline | Strain of Origin | B6.Cg-Thy1<a> |
| Is Recombinase | false | Is Wild Type | false |
| molecularNote | Exon 2 was floxed and a FRT-flanked PGK-neomycin-resistance cassette was inserted within intron 2 before the 3' loxP site. The floxed exon and neomycin selection cassette were removed by cre-mediated recombination. No Class 2 IGF-1 was detected by RT-PCR of liver tissue. |