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Cell Walls
Microbiology -Cell Walls
Characteristic | Gram-Positive Bacteria | Gram-Negative Bacteria | Acid-Fast Bacteria |
---|---|---|---|
Peptidoglycan | Thick layer | thin layer | relatively small amount |
Teichoic acid | often present | absent | absent |
Lipids | very little present | lipopolysaccaharide | mycolic acid & other waxes & glycolipids |
Outer membrane | absent | present | absent |
Periplasmic space | absent | present | absent |
Cell shape | always rigid | rigid or flexible | rigid or flexible |
Results of enzyme digestion | protoplast | spheroplast | difficult to digest |
sensivity to dyes & antiboiotics | most sensitive | moderately sensitive | least sensitive |