| Primary Identifier | MGI:5502231 | Allele Type | Targeted |
| Attribute String | Null/knockout | Gene | Extl2 |
| Transmission | Germline | Strain of Origin | 129P2/OlaHsd |
| Is Recombinase | false | Is Wild Type | false |
| molecularNote | A neomycin resistance cassette replaced part of exon 3 and all of exon 4. In situ hybridization confirmed the absence of transcript expression in E13 embryos. |