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Friday, 8 August 2014

Restriction modification Systems.

http://en.wikipedia.org/wiki/Bacteria

Bacteria resist phage infection through restriction modification systems that degrade foreign DNA,and a system that uses CRISPR sequences to retain fragments of the genomes of phage that the bacteria have come into contact with in the past, which allows them to block virus replication through a form of RNA interference.This CRISPR system provides bacteria with acquired immunity to infection.

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