The following schematic animation shows a closeup of Pol B catalysis (note the dissociation of the two phosphates of the incoming nucleotide). The movie was created by Michael Sawaya in the Kraut research group at UCSD, and is used here by permission. Please do not download this movie for local use without permission from the author. The URL for the Pol B movie page at UCSD is: http://chem-faculty.ucsd.edu/kraut/bpol.html.
 
 

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