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Sex pili

sex pili

(Science: cell biology) fine filamentous projections (pili) on the surface of a bacterium that are important in conjugation. Often seem to be coded for by plasmids that confer conjugative potential on the host, in the case of the f plasmid, the f pili are 8-9nm diameter and several microns long, composed of pilin. Whether the pili merely serve to establish and maintain adhesive contact between the partners in conjugation or whether dNA is actually transferred through the central core of the pilus is still unresolved, although a simple adhesion role is more generally accepted.


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Bacterial Genetics Project

... way. I was hoping to somehow use florescent labeling to observe the sex pili, but I have not been able to figure out what materials I need. Is there some way to label ...

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by Quiksilver737
Sat Mar 19, 2011 8:44 pm
 
Forum: Genetics
Topic: Bacterial Genetics Project
Replies: 0
Views: 1671

The Fiber Disease

... fimbriae (singular: fimbria) these help to stick to body surfaces. Pili can attach two bacterial cells together: sex pili are necessary for the transfer of certain plasmids between bacteria. Mask design of ...

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by Nadas Moksha
Sat Oct 28, 2006 3:28 am
 
Forum: Human Biology
Topic: The Fiber Disease
Replies: 7403
Views: 5478011

The Fiber Disease

... homologues in intracellular bacteria of amoebae. We sought and observed sex pili-like cell surface appendages for R. bellii. We also found that R. bellii very efficiently ...

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by London
Fri Jul 21, 2006 10:22 pm
 
Forum: Human Biology
Topic: The Fiber Disease
Replies: 7403
Views: 5478011

take home quiz

... prokaryotes stick to their substrate or each other? A) a capsule B) pili C) flagella D) sex pili E) All of the choices help prokaryotes stick to their substrate or each other. 10) ...

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by dionne2004
Thu Mar 23, 2006 6:02 pm
 
Forum: Cell Biology
Topic: take home quiz
Replies: 3
Views: 10469

flagella and cilia

... differ in function. Cilli and flagelli are used in locomotion, while pili are used in nutrition and respiration(common pilli) and making the connection between "male" and "female" bacteria(that posses or not the F plasmid)(sex pilli). Pilli also serve as receptors for bacteriophages

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by MrMistery
Mon Oct 10, 2005 6:16 pm
 
Forum: Cell Biology
Topic: flagella and cilia
Replies: 12
Views: 9992


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