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14 - PROKARYOTIC DIVERSITY BIOL 4125 SPRING 2009 LECTURE 14...

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PROKARYOTIC DIVERSITY BIOL 4125 SPRING 2009 LECTURE 14 The Firmicutes and Actinobacteria
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http://www.mbio.ncsu.edu/MB451 ( Actinobacteria ) ( Firmicutes ) The gram-positive Bacteria fall into two major phylogenetic subdivisions Gram-positive bacteria have no outer membrane and are bound only by the cytoplasmic membrane and a thick cell wall containing many layers of peptidoglycan (although some lack a cell wall). There are two distinct phylogenetic groups which were originally named based on their genomic G+C content. They are common in soil and sediment environments, where they are generally the predominant bacteria, and there are a number of clinically-relevant human pathogens in this group.
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