| Primary Identifier | MGI:2449695 | Allele Type | Targeted |
| Attribute String | Null/knockout | Gene | Opn4 |
| Transmission | Germline | Strain of Origin | 129S1/SvImJ |
| Is Recombinase | false | Is Wild Type | false |
| molecularNote | Exon 1 was replaced with a neomycin selection cassette inserted by homologous recombination. Protein was undetected by immunocytochemical analysis of homozygous mutant retinal tissue. |