| Primary Identifier | MGI:6757224 | Allele Type | Targeted |
| Attribute String | Conditional ready, No functional change | Gene | B2m |
| Transmission | Germline | Strain of Origin | 129S/SvEv |
| Is Recombinase | false | Is Wild Type | false |
| molecularNote | An FRT site flanked neomycin resistance gene cassette and a loxP site were inserted into intron 1 and a second loxP site into intron 3. The neo cassette was removed through subsequent flp-mediated recombination, leaving a conditional-ready allele with exons 2-3 floxed. |