The V7 cDNA of Rreb1with triple C-terminal V5 tags was inserted into the BamH1 site of the fourth exon of the L7/Pcp2 minigene, such that the mouse Pcp2 promoter drives expression of the V7 transcript, and this randomly inserted into the genome after injection into the pronucleus of a C57BL/6J zygote. (J:344394)