Ube2w^{tm1d(EUCOMM)Wtsi}

The L1L2_Bact_P cassette was inserted at position 16667939 of Chromosome 1 upstream of the critical exon 3 (Build GRCm39). The cassette is composed of an FRT site followed by lacZ sequence and a loxP site. This first loxP site is followed by neomycin resistance gene under the control of the human beta-actin promoter, SV40 polyA, a second FRT site and a second loxP site. A third loxP site is inserted downstream of the targeted exon 3 at position 16668723. The critical exon 3 is thus flanked by loxP sites. A "conditional ready" (floxed) allele was created by flp recombinase expression in mice carrying this allele. Subsequent cre expression resulted in a knockout mouse. Further information on targeting strategies used for this and other IKMC alleles can be found at http://www.informatics.jax.org/mgihome/nomen/IKMC_schematics.shtml. Western blot analysis confirmed the absence of protein expression in brain, spinal cord, heart, lung, kidney, liver, spleen, testis, pancreas and thymus. All three isoforms are affected by this allele. (J:230053)