Concomitant detection of Tax and CD4 antigens in peripheral blood mononuclear cells isolated from a patient infected with human T-cell leukemia virus type I.

Cells were cultivated for 24 hours (C, D) or analyzed fresh (A, B). The Tax protein was detected with the Lt-4 monoclonal antibody (B, D), and an irrelevant monoclonal antibody was used as a control isotype (A, C). One representative experiment of 3 is shown.