AAT Bioquest

What are the components of gram-positive bacteria cell walls?

Posted March 1, 2023


Gram-positive bacteria cell wall is thick, measuring about 15 nm to 80 nm. It is made up of a large amount of peptidoglycan arranged in multiple layers.  The main components in the cell wall are teichoic acids and teichuronic acids. Teichoic acids are connected to the peptidoglycan chain by covalent bonds. They may be of two types – wall teichoic acid and lipoteichoic acid. Teichuronic aids are synthesized as teichoic acid substitutes when the cell’s phosphate supply is insufficient. In addition to these acids, gram positive cell walls also contain neutral sugars and acidic sugars. These occur as subunits of polysaccharides.

Additional resources

Envelope Structures of Gram-Positive Bacteria

Gram Staining

MycoLight™ Dyes and Kits

MycoLight™ Rapid Fluorescence Gram-Positive Bacteria Staining Kit