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Pili sex

pili, sex

filamentous or elongated proteinaceous structures which extend from the cell surface in gram-negative bacteria that contain certain types of conjugative plasmid. These pili are the organs associated with genetic transfer and have essential roles in conjugation. Normally, only one or a few pili occur on a given donor cell. this preferred use of pili refers to the sexual appendage, to be distinguished from bacterial fimbriae (fimbriae, bacterial), also known as common pili, which are usually concerned with adhesion.


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fiber/hair moving thru water

... weakens the overall strength of the hair fiber. Gradual weakening of the hair fibers is involved in hair shaft defects and hair disorders like pili torti and monilethrix. Pili Torti Pili torti(trichokinesis, corkscrew hair) is the general name for rigidly twisted hair. The twisting of the hair ...

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by ebianco
Wed Apr 11, 2012 3:03 am
 
Forum: General Discussion
Topic: fiber/hair moving thru water
Replies: 17
Views: 15153

Prokaryotic Cell Question

... Here it is... During a period of low water availability, which prokaryotic structure would protect a cell from dessication (drying out)? A. pili B. plasma membrane C. nucleus D. cell wall Alright. So, I KNOW it isn't A or C. I'm struggling because I assumed glycocalyx would be an option, ...

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by kneecoal
Sun Feb 12, 2012 9:44 pm
 
Forum: Cell Biology
Topic: Prokaryotic Cell Question
Replies: 5
Views: 5912

Re:

... to butt in so late, but I found this topic interesting. Here one might argue that, at that point in life's timeline, bacterial conjugation and pili may not have evolved yet. I personally do not have any knowledge of when pili had evolved, but if someone has insight on this it would probably ...

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by awkko808
Sun Dec 04, 2011 3:19 am
 
Forum: Evolution
Topic: Viral-induced evolution
Replies: 6
Views: 5579

Re: Bacterial Conjugation

I have not been able to come up with a method. One idea I had was to label an anti E.coli Pili antibody, but I don't know if that would work. If it is possible, can you tell me how?

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by Quiksilver737
Sun Mar 20, 2011 4:48 am
 
Forum: Cell Biology
Topic: Bacterial Conjugation
Replies: 3
Views: 2236

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: 1709
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