| Primary Identifier | MGI:6457571 | Allele Type | Targeted |
| Attribute String | Humanized sequence, Inserted expressed sequence | Gene | Il21 |
| Transmission | Germline | Is Recombinase | false |
| Is Wild Type | false |
| molecularNote | Using a BAC containing the mouse Il21 gene, IRES sequence, the cDNA for human CD2 and poly(A) signal sequence was inserted in the 3' UTR of the endogenous locus. |