1. OVERVIEW
1. OVERVIEW
Gram-negative BacterialMembrane StructureCell MembranePeptidoglycanCytoplasmicMembrane
Cell Membrane Peptidoglycan Cytoplasmic Membrane Gram-negative Bacterial Membrane Structure
Gram-positive BacterialMembrane StructurePeptidoglycanLayers.CytoplasmicMembrane
Peptidoglycan Layers Cytoplasmic Membrane Gram-positive Bacterial Membrane Structure
The Cell WallIt is madeof peptidoglycans.Gram-positivebacteriahaveanenvelopeofupto40layersofpeptidoglycans,to containaninternal osmotic pressure ofabout 20 atmGram-negative bacteria have an internal pressureof about5atm, and have thinner wallsThe cell wall is specific to bacteria, and indispensable to theirsurvival
The Cell Wall It is made of peptidoglycans. Gram-positive bacteria have an envelope of up to 40 layers of peptidoglycans, to contain an internal osmotic pressure of about 20 atm Gram-negative bacteria have an internal pressure of about 5 atm, and have thinner walls The cell wall is specific to bacteria, and indispensable to their survival
PeptidoglycansThecell wall is anetworkofpeptidoglycans-NAMA-NAG-NAMA-NAG-NAMA-NAG-NAMA-NAG-NAMA-NAG-N-NAMA-NAGNAMA-NAG-NAMA-NAG-NAMA-NAG-NAMA.-NAMA-NAG-NAMA-NAG-NAMA-NAG-NAMA-NAG-NAMA-NAG-NAMA-NAG-NAMA-NAG-NA-NAMA-NAG-NAMA-NAG-NAMA-NAG=N-acetylmuramic acid; NAMA=N-acetylglucosamine (amino sugars)=tetrapeptidechain=5glycineresidues linkingthepeptidechains
Peptidoglycans The cell wall is a network of peptidoglycans