| Primary Identifier | MGI:2386536 | Allele Type | Targeted |
| Attribute String | Null/knockout | Gene | Polb |
| Transmission | Germline | Strain of Origin | 129P2/OlaHsd |
| Is Recombinase | false | Is Wild Type | false |
| molecularNote | The endogenous promoter and exon 1 were deleted when a floxed region extending from 2 kb upstream of exon 1 through a portion of intron 1 was excised by the in vitro expression of cre recombinase. |