Bacterial cell structure

Bacterial cell structure

1. Cell Wall

   • Gram -positive
     • Peptidoglycan
       • N-acetylglucosamine (NAG)
       • N-acetylmuramic acid (NAM)
       • amino acids
     • Teichoic acids
       • Lipoteichoic acid
       • Wall teichoic acid
   • Gram-negative
     • 1-Outer membrane
     • 2-Lipopolysaccharides (endotoxin)
       • A phospholipid called (lipid A)
       • A core polysaccharide
       • An outer polysaccharide(O antigen)
     • 3- Lipoprotein layer
     • 4-Periplasmic space
     • 5-Peptidoglycan

2. Cytoplasmic membrane

   • a. Phospholipid bilayer
     • Hydrophilic
     • Hydrophobic
   • b. Protein
     • peripheral proteins
     • integral proteins

3. Cytoplasm

   • Ribosomes
   • Granules
   • Nucleoid
   • Plasmids

4. Structures External to the Cell Wall

   • Capsule
   • Glycocalyx (Slime Layer)
   • Flagella
   • Pili and Fimbriae