Two sequential targeting events generated Igs14tm1Dolm and Igs13tm1Dolm. Cre-mediated recombination removed both floxed neomycin cassettes creating a deletion that spans 440 kbp region on mouse chromosome 7F3 (between and including Coro1a to Spn); a region highly conserved with the human chromosome 16p11.2 region whose copy number variations are associated with autism spectrum disorders and schizophrenia. (J:210018)