Gram positive & Gram negative

Basic introduction about Gram positive and gram negative bacteria

1. GRAM POSITIVE & GRAM NEGATIVE BACTERIA 1 Present by M.ANANDHA PRABHAKARAN, M.Tech ., ALAGU PHARMACY , 38, CHRUCH ROAD, DHARAPURAM, TIRUPUR DIST TAMILNADU - 638656

2. Gram Positive Teichoic acids Peptidoglycan Layer Periplasmic space Plasma membrane Cytoplasm 2

3. Gram Negative Lipopolysaccharide Outer membrane Periplasmic space Peptidoglycan Porins Plasma membrane Cytoplasm 3

4. Comparison Positive Negative After staining Dark blue Pink Peptidoglycan Thick and rigid Thin Teichoic acid Present & consists of water soluble polymers, alcohols and phosphate Absent Outer membrane Peptiglycan Lipoproteins & phospholipids used to protect the cell from mechanical shear Porins Absent Present & Allow the entry of molecules ( i.e ) Disaccharides , B 12 , Amino acid, Nucleotides 4