| Primary Identifier | MGI:7447017 | Allele Type | Targeted |
| Attribute String | Recombinase | Gene | Oprm1 |
| Transmission | Germline | Strain of Origin | C57BL/6J |
| Is Recombinase | true | Is Wild Type | false |
| molecularNote | A T2A-Cre sequence was inserted into the fifth exon of the Oprm1 gene and replaced a TAA stop codon by homologous recombination in C57BL/6J ES cells. |