Cc2d1b^{tm1c(KOMP)Wtsi}

The L1L2_st0 cassette was inserted at position 108480157 of Chromosome 4 upstream of the critical exon 3 (Build GRCm39). The cassette is composed of an FRT flanked lacZ/neomycin sequence followed by a loxP site. An additional loxP site is inserted downstream of the targeted exon 3 at position 108481080. 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 results 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 (J:236761)