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Some bacteria attack using spring-loaded poison daggers
Date:2/27/2012

of the system."

The firing mechanism is similar to the one used by bacteriophages, viruses that infect bacteria. Phage tails are made up of an outer sheath and an inner tube that gets ejected. Since other researchers had previously established that proteins in the type VI secretion system are similar to those found in various parts of the phage tail and its associated structures, there is even more support for the newly discovered mechanism for the type VI secretion system.

"These amazing tubes inside the cell went undetected for decades of traditional electron microscopy, and they may have stayed that way for many more," says Jensen, who is also an HHMI investigator. "But Caltech made a wise investment a long time ago, with the generous help of the Gordon and Betty Moore Foundation, into our one-of-a-kind electron cryomicroscope, and it is truly what allowed us to see these structures."


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Contact: Deborah Williams-Hedges
debwms@caltech.edu
626-395-3227
California Institute of Technology
Source:Eurekalert  

Page: 1 2 3

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