Systems Microbiolo33

Systems Microbiolo33 - Also for genetic engineering,...

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Systems Microbiology ° General properties of viruses o Viruses are characterized by being able to replicate their nucleic acids independent of the cell, but completely dependent on the cellular function o There are huge numbers of viruses out there o They infect people, animals, plants, bacteria (bacteriophage) o Extracellular forms (virions) just wait, until they can become active o There are bacteria that live symbiotically/parasitically in other cells, so that they cannot live independently, but these are not viruses ° One clear way to distinguish them is that bacteria have both DNA and RNA, while viruses have only one or the other o Viruses have a huge range in size o Viruses are essential tools for genetic analysis
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Unformatted text preview: Also for genetic engineering, synthetic biology Viral structure o Nucleic acid can be quite long, coiled. The size of the virion is limited by the size of the nucleic acid. o Two structures: Helical symmetry Icosahedral symmetry o Some viruses combine both symmetries These attack only bacteria and archaea you dont find them in animal viruses These are called complex viruses o Some animal viruses have outer membrane envelopes This allows them to merge cytosol with the animal cell and enter This lipid bilayer is derived from the host cell However, the proteins in this membrane are viral-encoded....
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This note was uploaded on 01/24/2012 for the course MCB MCB2010 taught by Professor Smith during the Fall '09 term at Broward College.

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