| Primary Identifier | MGI:1857339 | Allele Type | Targeted |
| Attribute String | Null/knockout | Gene | Rb1 |
| Inheritance Mode | Recessive | Transmission | Germline |
| Strain of Origin | 129S7/SvEvBrd-Hprt1<+> | Is Recombinase | false |
| Is Wild Type | false |
| molecularNote | Insertion of a neomycin cassette into exon 20. |