The targeting vector contains from 5' to 3' a loxP site, a STOP cassette containing a neomycin resistance gene followed by a second loxP site, the murine Fabp5 cDNA, a viral 2A oligopeptide (T2A) self cleaving peptide (which mediates ribosomal skipping), and a yellow fluorescent protein (YFP) reporter, and a polyadenylation sequence. (J:317465)