Bacterial DNA polymerase III
                  of
      
"REPLISOME"

  a dimer of 10 proteins:
        replicates both strands
        simultaneously

  catalytic subunit =  a

  proofreading subunit =  ε

  blue/yellow dimers   =
     clamps that encircle
     DNA template and
     move it through
     catalytic unit -
     like a rope through a ring