| Primary Identifier | MGI:7643916 | Allele Type | Targeted |
| Attribute String | Null/knockout, Reporter | Gene | Il31 |
| Transmission | Germline | Strain of Origin | Not Specified |
| Is Recombinase | false | Is Wild Type | false |
| molecularNote | Enhanced green fluorescent protein (EGFP) and an FRT-flanked neomycin-resistance cassette were inserted immediately after the initiation codon. The neomycin cassette was removed via flp-mediated recombination. |