Gabe McCool and Maura Cannon, University of Massachusetts, Amherst.

     Above is a transmission electron micrograph of a Bacillus megateriumcell captured early in division. Two nucleoids can be distinguished on either side of the division plane, indicating that chromosome replication and segregation has already taken place. A nascent septum (S) can be seen on both sides of the division plane, as evident by invaginated cell wall and membrane material.

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All Introduction Images and Schematics:

  • 1. Septum in a dividing cell (TEM).
  • 2. Cell division schematic and FtsZ function.
  • 3. FtsZ::GFP chimera protein localized as a ring in vivo.
  • 4. FtsZ/tubulin sequence alignment.
  • 5. Evolutionary history of FtsZ and tubulin.