| Primary Identifier | MGI:6509974 | Allele Type | Targeted |
| Attribute String | Null/knockout | Gene | Sfrp4 |
| Transmission | Germline | Strain of Origin | (129X1/SvJ x 129S1/Sv)F1-Kitl<+> |
| Is Recombinase | false | Is Wild Type | false |
| molecularNote | A loxP site was inserted upstream of exon 1. An FRT- and loxP-flanked neomycin resistance cassette was inserted downstream of exon 1. Cre-mediated recombination removed exon 1 and left the FRT-flanked selection cassette intact. |