| Primary Identifier | MGI:3795228 | Allele Type | Targeted |
| Gene | Esr1 | Transmission | Germline |
| Strain of Origin | 129X1/SvJ | Is Recombinase | false |
| Is Wild Type | false |
| molecularNote | Exon 9 was replaced with a self-excising floxed neo cassette and an exon 9 containing a nucleotide susbtitution that results in an amino acid substitution of leucine for glycine at position 525 (G525L). |