RAL DIFFERENT PROTEINS.
             Signals encoded in DNA tell RP where to start and stop
             RP has to know where to start and stop. Process differs between eukaryotes and bacteria.
             Simpler, initiation of T dictates which proteins to be produced and at what rate. A detachable subunit in bacterial RP sigma factor reads signals in DNA that tell it where to begin Transcribing. RP molecules adhere weakly to DNA upon collision and RP slides fast along DNA until RP dissociates again. However, when RP slides into promoter region, starting point for RNA synthesis, RP binds to it. RP through sigma factor recognizes DNA sequence via specific contacts with bases exposed on outside of helix.
             Binding of RP to promoter DNA causes opening of double helix, exposing n'tides on each strand (opening doesn't require ATP hydrolysis) . Results in more energetically favorable state. One of two DNA strands serves
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