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8 Cards in this Set
- Front
- Back
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Single circular db-stranded DNA
DNA supercoiled by gyrase Not membrane bound |
Nucleoid
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hydrophilic, polysaccharide, antigenic, anti-phagocytic, adherence/invasion
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Capsule
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Mechanism to avoid elimination by host immune response, some bacteria can switch from production of one antigenic type to another
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Phase variation
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What is unique to gram + cell envelope
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Peptidoglycan thick
Teichoic acid Lipoteichoic acid: anchors CW to cell membrane 2 layers |
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What is unique to gram - cell envelope
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-Peptidoglycan thin
-No teichnoic acid -Peptidoglycan linked by lipoprotein to OM -Periplasmic space contains enzymes -OM contains LPS |
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Synthesis that occurs sequentially of peptidoglycan: in cytoplasm, CM, periplasm (gram -), or cell surface (gram +)
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Vectorial synthesis
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Outer membrane of gram - contains
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LPS on outer leaflet
Phospholipid on inner leaflet |
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LPS structure (endotoxins)
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Lipid A in OM
Core polysaccharide in IM O antigen all only on gram - |
