| Primary Identifier | MGI:3800291 | Allele Type | Targeted |
| Attribute String | Null/knockout | Gene | Il21r |
| Transmission | Germline | Strain of Origin | 129/Sv |
| Is Recombinase | false | Is Wild Type | false |
| molecularNote | Exons 2 through 5 were replaced with a neo cassette. The absence of transcript was confirmed by RT-PCR on splenocyte extracts. |