| Primary Identifier | MGI:3640309 | Allele Type | Targeted |
| Attribute String | Null/knockout | Gene | Csn3 |
| Transmission | Germline | Strain of Origin | (129X1/SvJ x 129S1/Sv)F1-Kitl<+> |
| Is Recombinase | false | Is Wild Type | false |
| molecularNote | A 3.3 kb fragment including exon 1 and the 5' upstream region was replaced via homologous recombination with a loxP site, partial Hprt gene and neomycin gene. Northern blot analysis did not detect any mRNA; however, expression of other casein genes is similar to wild-type. |