| Primary Identifier | MGI:3719635 | Allele Type | Targeted |
| Attribute String | Null/knockout | Gene | Icos |
| Transmission | Germline | Strain of Origin | 129P2/OlaHsd |
| Is Recombinase | false | Is Wild Type | false |
| molecularNote | An IRES-lacZ-neo was inserted into the locus to replace almost all of exon 2 and all of exons 3 and 4. |