Spop^{tm1d(KOMP)Mbp}

The L1L2_Bact_P cassette was inserted at position 95364610 of Chromosome 11 upstream of the exon 4 (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 exon 5 at position 95365683. Exons 4 and 5 are 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. Absence of protein expression was confirmed by immunoblot analysis. 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. (J:239074)