| Primary Identifier | MGI:2653925 | Allele Type | Targeted |
| Attribute String | Null/knockout | Gene | Exo1 |
| Transmission | Germline | Strain of Origin | STOCK 129/Sv and C57BL/6J and SJL |
| Is Recombinase | false | Is Wild Type | false |
| molecularNote | A hygromycin resistance gene cassette was inserted into exon 6 via homologous recombination resulting in disruption of the I-nuclease domain. Disruption of exon 6 in homozygous mutant ES cells was confirmed by northern and Western blot analysis. |