http://64188.org/story.php?title=s-we-failed-to-detect-any-sp1-at-the-pp5-5ltr-5 S we failed to detect any Sp1 at the PP5*/ 5'LTR junction or in the coding region of the HIV genome (Figure 5B, bars 1, 2, 5 and 6). Thus, the absence of Sp1 at the 5'LTR in untreated cells is a result of TI due to the actively transcribed PP5* gene. The finding that TNF- stimulation increased the levels of Sp1 not only at the 3' but also at the 5'LTR indicates that stimulating PIC assembly on the Wed, 22 Feb 2023 20:44:30 UTC en