Fertility factor

Jump to: navigation, search

WikiDoc Resources for Fertility factor

Articles

Most recent articles on Fertility factor

Most cited articles on Fertility factor

Review articles on Fertility factor

Articles on Fertility factor in N Eng J Med, Lancet, BMJ

Media

Powerpoint slides on Fertility factor

Images of Fertility factor

Photos of Fertility factor

Podcasts & MP3s on Fertility factor

Videos on Fertility factor

Evidence Based Medicine

Cochrane Collaboration on Fertility factor

Bandolier on Fertility factor

TRIP on Fertility factor

Clinical Trials

Ongoing Trials on Fertility factor at Clinical Trials.gov

Trial results on Fertility factor

Clinical Trials on Fertility factor at Google

Guidelines / Policies / Govt

US National Guidelines Clearinghouse on Fertility factor

NICE Guidance on Fertility factor

NHS PRODIGY Guidance

FDA on Fertility factor

CDC on Fertility factor

Books

Books on Fertility factor

News

Fertility factor in the news

Be alerted to news on Fertility factor

News trends on Fertility factor

Commentary

Blogs on Fertility factor

Definitions

Definitions of Fertility factor

Patient Resources / Community

Patient resources on Fertility factor

Discussion groups on Fertility factor

Patient Handouts on Fertility factor

Directions to Hospitals Treating Fertility factor

Risk calculators and risk factors for Fertility factor

Healthcare Provider Resources

Symptoms of Fertility factor

Causes & Risk Factors for Fertility factor

Diagnostic studies for Fertility factor

Treatment of Fertility factor

Continuing Medical Education (CME)

CME Programs on Fertility factor

International

Fertility factor en Espanol

Fertility factor en Francais

Business

Fertility factor in the Marketplace

Patents on Fertility factor

Experimental / Informatics

List of terms related to Fertility factor


The Fertility factor (also known as F factor or sex factor) is a bacterial DNA sequence that allows a bacterium to produce a sex pilus necessary for conjugation. It contains 20 tra (for "transfer") genes and a number of other genetic sequences responsible for incompatibility, replication, and other functions. The F factor is an episome and can exist as an independent plasmid or integrate into the bacterial cell's genome. There are several names for the possible states:

  • F+ bacteria possess F factor as a plasmid independent of the bacterial genome. The F plasmid contains only F factor DNA and no DNA from the bacterial genome.
  • F' (F-prime) bacteria possess an F plasmid that also includes some DNA taken from the bacterial genome.
  • F- bacteria do not contain F factor.

When an F+ cell conjugates with an F cell, the result is two F+ cells, both capable of transmitting the plasmid further by conjugation. In the case of Hfr, the result is one Hfr and one F cell because there is no F plasmid free to be replicated and transferred to the F cell. When F-prime plasmids are transferred to a recipient bacterial cell, they carry pieces of the donor's DNA that can become important in recombination. Bioengineers have created F plasmids that can contain inserted foreign DNA; this is called a fosmid.


de:F-Plasmid



Linked-in.jpg