| Primary Identifier | MGI:4452136 | Allele Type | Targeted |
| Attribute String | Conditional ready, No functional change | Gene | Sfn |
| Transmission | Germline | Strain of Origin | (129X1/SvJ x 129S1/Sv)F1-Kitl<+> |
| Is Recombinase | false | Is Wild Type | false |
| molecularNote | The first 434 coding base pairs of the single exon with a 5' loxP site was followed by SV40 PolyA signal with a downstream loxP site, and followed by a PGK neomycin selection cassette. Homozygous mice showed significantly reduced mRNA levels in mammary glands, although no apparent developmental or functional differences were observed. |