The transgene consists of 0.75 kb of Lck proximal promoter sequences and 0.8 kb of human BCL2L1 cDNA. Introns, exons, and polyadenylation sequences from the human growth hormone gene consitutes the 3' untranslated region of the construct. The Lck promoter was used to drive transgene expression in lymphoid tissues. Transgene expression in the thymus and spleen was verified by Western blot analysis and flow cytometry. (J:78583)