text: The type III partition system is the most recently discovered partition system. It is composed of tubulin-like GTPase termed TubZ, and the CBP is termed TubR.
  Amino-acid sequence identity can go down to 21% for TubZ proteins.
  The mechanism is similar to a treadmill mechanism:
  # Multiple TubR dimer binds to the centromere-like region stbDRs of the plasmids.
  # Contact between TubR and filament of treadmilling TubZ polymer. TubZ subunits are lost from the - end and are added to the + end.
  # TubR-plasmid complex is  pulled along the growing polymer until it reaches the cell pole.
  # Interaction with membrane is likely to trigger the release of the plasmid.
  The net result being transport of partition complex to the cell pole.