Lack of CD95-mediated cleavage of Bid in HTLV-1–infected MT-2 and SLB-1 cells. CEM, H9, HuT-102, MT-2, and SLB-1 cells were treated with 200 ng/mL LZ-CD95L for the indicated period of time and lysed. Lysates were subjected to SDS-PAGE and Western blot analysis with antibodies against Bid and Erk. The 22-kDa Bid and 15-kDa truncated Bid (tBid) are indicated. Analysis of Erk expression served as control for equal protein loading.