And if we break our cell wall, that bacterial cell will actually burst. Now, let's look at our description of the grampositive and our gram negative cell envelope. So, the cell envelope of grampositive basically contains the inner membrane, the phospholipid membrane, and a relatively thick peptidoglycan cell wall. Now, the gram negative contains this inner membrane, a thin cell wall, and an outer membrane. And the outer membrane contains these polysaccharides, which are based or lipopolysaccharides, which are basically the lipids attached to long chains of sugars. And these sugars create a net negative charge around the entire cell bacterial cell, and that protects it from different types of drugs.