| Primary Identifier | MGI:2662827 | Allele Type | Targeted |
| Attribute String | Modified regulatory region, Null/knockout | Gene | Rr320 |
| Transmission | Germline | Strain of Origin | 129X1/SvJ |
| Is Recombinase | false | Is Wild Type | false |
| molecularNote | A 2.3 kb genomic fragment encompassing the 5' DNase I hypersensitive site 3 (HS3) was replaced with a loxP site flanked neomycin resistance gene cassette inserted by homologous recombination. RT-PCR analysis indicated that the presence of neo cassette reduces Hbb expression by an additional 25 to 40% relative to Rr320tm1.1Ley. |