| Primary Identifier | MGI:7336815 | Allele Type | Targeted |
| Attribute String | Conditional ready | Gene | Optn |
| Transmission | Germline | Strain of Origin | (129X1/SvJ x 129S1/Sv)F1-Kitl<+> |
| Is Recombinase | false | Is Wild Type | false |
| molecularNote | A loxP site was introduced 5' of exon 1 and an FRT-neomycin-FRT-loxP cassette was placed 3' of exon 1. FLP-mediated recombination removed the neomycin cassette. |