RpoF

The gene rpoF (RNA polymerase, flagellum F) encodes the sigma factor "sigma-28" (σ28, or RpoF), a protein in "Escherichia coli" and other species of bacteria. Depending on the bacterial species, this gene may be referred to as "sigD" or "fliA". The protein encoded by this gene has been found to be necessary for flagellum formation.