Effect of prophage - • if host DNA damaged • one...

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Effect of prophage : Bacterium is now immune to infection by another lambda phage, because lambda repressor continuously produced ----- new phage DNA can be injected into cell and is circularized but is not transcribed or replicated. But prophage can be excised , because lambda cleverly uses host response system to potentially lethal situations:
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Unformatted text preview: • if host DNA damaged • one reaction by host cell is to activate a protease • protease also cleaves lambda repressor • lambda DNA now transcibed including a gene for an enzyme that cuts prophage DNA from bacterial chromosome • circularization of lambda DNA • lytic cycle can start...
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This document was uploaded on 11/03/2011 for the course BIOLOGY MCB2010 at Broward College.

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