| Primary Identifier | MGI:3521923 | Allele Type | Targeted |
| Attribute String | Null/knockout | Gene | Top2b |
| Transmission | Germline | Strain of Origin | 129S6/SvEvTac |
| Is Recombinase | false | Is Wild Type | false |
| molecularNote | The floxed region was excised from Top2btm2Jcw by crossing to mice carrying Tg(PRM-Cre)58Og. |