| Primary Identifier | MGI:3716859 | Allele Type | Targeted |
| Attribute String | Null/knockout | Gene | Prex1 |
| Transmission | Germline | Strain of Origin | 129P2/OlaHsd |
| Is Recombinase | false | Is Wild Type | false |
| molecularNote | Exon 5, which encodes catalytic residues in the DH domain, was replaced with a neomycin resistance cassette and a translational stop codon. Northern blot confirmed absence of transcript in mutant mice. |