Main chemical composition: ✓ N-acetylglucosamine (NAG) ✓ N-acetylmuramic acid (NAM)  Short peptides A multi-layer network macromolecular compound polymerized from the above components.

An acidic polysaccharide bound to the cell wall of G bacteria, also known as Tannic acid; unique to G bacteria

G-bacteria are membrane-shaped outside the peptidoglycan layer and are composed of phospholipid molecules, Outer wall (membrane) layer composed of lipoproteins and lipopolysaccharides; unique to G-bacteria;

Primary dyeing, mordant dyeing, decolorization, counter dyeing

G bacterial cell wall

G-bacterial cell wall

Phospholipids (20% to 30%)

Protein (50% to 70%)

1. Selectively control the transport and exchange of materials inside and outside cells; 2. Maintain the barrier of normal intracellular osmotic pressure; 3. A place where various components of the cell wall and sugar coat (macromolecules such as lipopolysaccharide, peptidoglycan, teichoic acid and capsule) are synthesized; 4 Home to many enzymes and components of the electron transport chain; 5. Energy production base for oxidative phosphorylation or photosynthetic phosphorylation; 6 The insertion site of the flagellum and provides it with the energy required for movement

Most of them are connected in series on mRNA and exist in the form of polymers; It is the place where proteins are synthesized.

formed by invagination of the cytoplasmic membrane a sac-like structure filled with layers shaped or tubular vesicles.

More common in G bacteria

Intermediate body located in the center of the cell: Promotes the formation of cell compartments, is related to DNA replication, distribution and cell division;

Intermediates located around cells: Relevant to the secretion of extracellular enzymes (such as penicillinase); center of oxidative phosphorylation (~eukaryotic mitochondria).

formed by invagination of the cytoplasmic membrane Lamellar structure, containing green leaves Photosynthetic colors such as pigments and phycobilichromes proteins and photosynthetic enzymes.

A polyhedral structure of autotrophic bacteria

Physiological function

Phytopathogenic bacterial cells are less likely to have capsules.

The part that connects the basal body of the flagellum to the flagellar filament.