| Primary Identifier | MGI:2672883 | Allele Type | Targeted |
| Attribute String | Null/knockout | Gene | Rrm2b |
| Transmission | Germline | Strain of Origin | 129/Sv |
| Is Recombinase | false | Is Wild Type | false |
| molecularNote | A 3.4 kb genomic fragment encompassing exons 3 and 4 was replaced with a neomycin selection cassette inserted by homologous recombination. Transcript was undetected by Northern blot analysis of MEFs derived from homozygous mutant mice. |