Ly 20 activation of viral transcription (see Figure 7) already precludes detection of the upstream transcription. This finding is not surprising, as we demonstrated that there is 11-fold or 38-fold more viral mRNA than *mRNA in TNF- treated cells (Figure 2D, bars 3 and 4). Predictably, our control experiments demonstrate that the ratio between the Rev- and Env-containing transcripts was 1 in untr