Grammnegatiivset
Grammnegatiivset, also known as Gram-negative bacteria, are a group of bacteria that lack a thick peptidoglycan layer in their cell walls, which is a characteristic feature of Gram-positive bacteria. This absence of peptidoglycan allows Gram-negative bacteria to retain the crystal violet stain used in the Gram stain procedure, resulting in a pink or red appearance under the microscope. The cell walls of Gram-negative bacteria are typically composed of a thin peptidoglycan layer, an outer membrane, and an outer layer of lipopolysaccharides (LPS) and lipoproteins.
The outer membrane of Gram-negative bacteria is a phospholipid bilayer that contains porins, which are protein
Examples of Gram-negative bacteria include Escherichia coli, Salmonella, Pseudomonas aeruginosa, and Klebsiella pneumoniae. These bacteria can