| Primary Identifier | MGI:2182707 | Allele Type | Targeted |
| Attribute String | Null/knockout | Gene | Il21r |
| Transmission | Germline | Strain of Origin | C57BL/6 |
| Is Recombinase | false | Is Wild Type | false |
| description | ES cell line = J12. |
| molecularNote | Exon 1 was replaced with a neomycin resistance gene via homologous recombination. Absence of gene expression was verified by PCR of total RNA from homozygous mutant animals. |