A pair of insulator sequences, CMV enhancer/beta-actin promoter, loxP site, 3 stop transcription sites, loxP site, nuclear localized (nls) tdTomato-3xHA (tdTomato-hemagglutinin) epitope, rabbit beta-globin 3' UTR, and a pair of insulator sequences were inserted into the gene in the indicated order via targeted recombination. (J:220411)