| Primary Identifier | MGI:3774130 | Allele Type | Gene trapped |
| Attribute String | Null/knockout, Reporter | Gene | Polr1b |
| Transmission | Germline | Strain of Origin | (C57BL/6NCrlj x CBA/JNCrlj)F1 |
| Is Recombinase | false | Is Wild Type | false |
| molecularNote | The gene trap vector pU-Hachi (containing En-2 intron, splice acceptor and a floxed IRES-beta-geo cassette) was inserted 202 bp downstream of exon 14. The presence of the lacZ transcript was confirmed by northern blot analysis on brain, heart, kung, kindey and testis extracts. |