Tep1^{tm1a(NCOM)Mfgc}

The NorCOMM2LS selection cassette replaces the region between positions 50864076 and 50863972 (U5 to U3) of Chromosome 14 upstream of the targeted exon(s) (Build 38). The cassette is composed of an F3 site followed by AttB1, IRES and LacZ sequences and then a loxP site. This first loxP site is followed by delta TK1, a T2A sequence and Neomycin, under the control of the human beta-actin promoter and PGK polyA. These are followed by a second F3 site and a second loxP site. A third loxP containing cassette is inserted downstream of the targeted exon(s) between positions 50860287 and 50860158 (D5 to D3). It contains the third loxP followed by an FRT site and AttB2 sequence. The targeted critical exon(s) is(are) thus flanked by loxP sites. A floxed allele can be created by flp recombinase expression in mice carrying this allele. Subsequent cre expression results in a knockout mouse. If cre expression occurs without flp expression, a reporter knockout mouse will be created. (J:165964)