Figure 2. Chemical probing experiments on HIV initiation complexes with 69nt model HIV1 genomic RNA.
Accessibility of adenosine N1 and cytosine N3 positions to reaction with dimethyl sulfate (DMS) was detected in the presence or absence of 1:1 stoichiometry of either pure bovine native tRNALys3 (nat) or T7 RNA polymerase transcript (T7). Reactivity with DMS was detected using primer extension with reverse transcription using a DNA primer in the absence (−) and presence (+) of dimethyl sulfate reaction. Reactions were performed at room temperature as described.