The transgene contains a 1.9 kb LCR/TE (locus control region and thymocyte enhancer) region, 1.6 kb of core E8I enhancer and promoter of Cd8a gene (P8a) driving expression of a cre recombinase gene and GFP reporter gene in mature Cd8a lineage cells. The pound symbol (#) is used when no line is specified and/or lines are pooled. (J:274549)