| Primary Identifier | MGI:1857466 | Allele Type | Targeted |
| Attribute String | Null/knockout | Gene | Igf1 |
| Transmission | Germline | Strain of Origin | 129S7/SvEvBrd-Hprt1<+> |
| Is Recombinase | false | Is Wild Type | false |
| molecularNote | A neomycin selection cassette was inserted into exon 3 after codon 15. This mutation inserts multiple stop codons into all reading frames of the B chain of the encoded protein. RT-PCR analysis demonstrated that the transcript is undetectable in homozygous animals. |
