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. Author manuscript; available in PMC: 2010 Feb 1.
Published in final edited form as: Future Microbiol. 2009 Apr;4:299–321. doi: 10.2217/fmb.09.4

Figure 3. Structural comparison of HIV-1, SIV and HTLV-1 long terminal repeats.

Figure 3

Locations of the binding sites for C/EBP, TATA binding protein, Sp factors, NF-κB and ATF/CREB factors are shown (not to scale). Although no canonical C/EBP-binding sites have been identified within the HTLV-1 long terminal repeat, C/EBP has been shown to be able to bind to TRE-1 repeat III. The three 21 bp repeats of TRE-1 are illustrated on the HTLV-1 long terminal repeat.

ATF: Activating transcription factor; C/EBP: CCAAT/enhancer protein; CREB: cAMP response element binding protein; HTLV: Human T-cell leukemia virus type 1; NF-κB: Nuclear factor-κB; TRE: Tax-responsive element.