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Structure of bacterial cell
Cell wall
        Gram(+) cell wall
                                                 Gram(-) cell wall
 thick peptidoglycane
                                       thin peptidoglycane
                                      no teichoic acids
 teichoic acid, lipoteichoic acid
                                      outer membrane - .molecular screen.
                                          integral proteins
 polysaccharides
                                          Porins
                                          permeases,
                                          translocation proteins
                                          protein receptors
                                      lipopolysaccharide LPS =
                                       endotoxin (negative charge,
                                       hydrophobic, anti-phagocytotic, toxic)
                                          lipid A
                                          core polysaccharides
                                          O-antigen
Gram stain method
Cell wall:
Peptidoglycane or murein




 network-like polymere

 surrounds the cell like net bag

 many layers

 very rigid

 Gram(+): lysozyme may break       protoplast

 Gram(-): penicillin may break     spheroplast
                                      L-form
Flagella


-for motility

long spiral protein chains-flagellin
Position Of flagella
Pili
- for attachment;
- for changing of
DNA between
bacteria (sex of
bacteria).
Bls 107 general microbiology
Bls 107 general microbiology
Bls 107 general microbiology
Bls 107 general microbiology
Bls 107 general microbiology
Bls 107 general microbiology
Bls 107 general microbiology
Bls 107 general microbiology
Bls 107 general microbiology
Bls 107 general microbiology
Bls 107 general microbiology
Bls 107 general microbiology

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  • 14. Cell wall Gram(+) cell wall Gram(-) cell wall  thick peptidoglycane  thin peptidoglycane  no teichoic acids  teichoic acid, lipoteichoic acid  outer membrane - .molecular screen.  integral proteins  polysaccharides  Porins  permeases,  translocation proteins  protein receptors  lipopolysaccharide LPS = endotoxin (negative charge, hydrophobic, anti-phagocytotic, toxic)  lipid A  core polysaccharides  O-antigen
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  • 18.
  • 19.
  • 20. Cell wall: Peptidoglycane or murein network-like polymere surrounds the cell like net bag many layers very rigid Gram(+): lysozyme may break protoplast Gram(-): penicillin may break spheroplast L-form
  • 21.
  • 22.
  • 23.
  • 24.
  • 25.
  • 26.
  • 27.
  • 28.
  • 29.
  • 30.
  • 31.
  • 32.
  • 33.
  • 34.
  • 35. Flagella -for motility long spiral protein chains-flagellin
  • 37.
  • 38.
  • 39.
  • 40. Pili - for attachment; - for changing of DNA between bacteria (sex of bacteria).