| Primary Identifier | MGI:1930816 | Allele Type | Targeted |
| Attribute String | Modified regulatory region, Null/knockout | Gene | Rr27 |
| Transmission | Germline | Strain of Origin | 129P2/OlaHsd |
| Is Recombinase | false | Is Wild Type | false |
| molecularNote | A loxP-flanked neomycin resistance cassette replaced a region of the gene from approximately -2 to -4kb relative to the transcription start site (the DMD domain). Cre-mediated recombination removed the neomycin cassette in this derivative of Rr27tm1Msb. |