| Primary Identifier | MGI:1857239 | Allele Type | Targeted |
| Attribute String | Null/knockout | Gene | Ptgs2 |
| Transmission | Germline | Strain of Origin | 129S7/SvEvBrd-Hprt1<b-m2> |
| Is Recombinase | false | Is Wild Type | false |
| molecularNote | A 1.8 kb genomic fragment containing exon 1 and the transcription and translation start sites was replaced with a neomycin selection cassette. Northern blot analysis on RNA derived from embryonic fibroblasts derived from homozygous embryos demonstrated that no detectable transcript was produced from this allele. |