Dictionary > F-negative bacterium

F-negative bacterium

Definition
noun, plural: F bacteria
The bacterial strain that does not contain F factor.
Supplement
F bacterium serves as the recipient cell of F factor from a bacterium that has it. A copy of F factor is transferred to the F bacterium through conjugation. The result following conjugation becomes F+ and thereby acquires the ability to form sex pilus essential in initiating conjugation with other bacteria. The now F+ cell becomes a potential donor of F factor to other bacteria.
Variant(s):

  • F bacterium

Compare (with other groups of bacteria in terms of F factor):

  • Hfr bacteria
  • F+ bacteria
  • F’ bacteria
  • See also:

    • F factor


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