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Lysogeny

Lysogeny

(Science: virology) The ability of some phages to survive in a bacterium as a result of the integration of their dna into the host chromosome. The integrated dna is termed a prophage. A regulator gene produces a repressor protein that suppresses the lytic activity of the phage, but various environmental factors, such as ultraviolet irradiation may prevent synthesis of the repressor, leading to normal phage development and lysis of the bacterium. The best example of this is bacteriophage lambda.


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Phage

Does prophage in lysogeny get inactivated? Prophage is a potent phage produced during lysogenic cycle of bacphages. Does potential of a prophage to be a virulent phage get inactivated?

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by Qphage
Thu Aug 23, 2007 12:06 pm
 
Forum: Microbiology
Topic: Phage
Replies: 3
Views: 2631

Answer this !!

ds DNA is formed from the +RNA by reverse transcriptase. The ds DNA is then incorporated into the host chromosomal DNA and the virus enters lysogeny cycle. It's a characteristic of retrovirus as u mention before? why it does so? guess it does that so that it can be incorporated into the host ...

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by Nite
Tue Jan 24, 2006 3:59 pm
 
Forum: Microbiology
Topic: Answer this !!
Replies: 38
Views: 18253

lysogeny

sorry :) a habit i am trying to get over.

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by lara
Sat Oct 15, 2005 10:52 am
 
Forum: Microbiology
Topic: lysogeny
Replies: 10
Views: 11573

lysogeny

the time period b/w the injection of the viral dna in2 the host till the appearance of a viable progeny-is this not the eclipse period?y the fuss about destroyin' the empty coat??

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by lara
Thu Oct 13, 2005 11:23 am
 
Forum: Microbiology
Topic: lysogeny
Replies: 10
Views: 11573

lysogeny

... I've heard about it also...but still cloudy in my mind...it's about endotoxin and exotoxin which is programmed by viruses... Oh, more addition, in Lysogeny phase, virus also combine their gene with the host's gene...and when it's time for the host to do mitosis or binnary fission, the host will ...

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by victor
Sun Oct 09, 2005 12:31 pm
 
Forum: Microbiology
Topic: lysogeny
Replies: 10
Views: 11573
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