In type I walls

Eukaryotic organisms such as algae, fungi and higher plants, the

multilayered cell wall composed for the most part either

cellulose and chitin. Cellulose and chitin are polysaccharides

, ie they consist of many sugar molecules linked. Cellulose is a polymer of glucose

, which contains only carbon, hydrogen and oxygen, while the chitin polymer

N-acetylglucosamine, a sugar that contains nitrogen as well. Both cellulose and chitin are linear, unbranched polymers and

corresponding sugars, and several dozen of these polymers are collected in a large crystal

type of cable, called microfibrils, that coil around the cell >> << cellulose microfibrils form a scaffold of plant cell walls. At least two types of

. primary walls of species of flowering plants

(angiosperms). In type I

wall and some monocots microfibrils bound together the sugar

called xyloglucans, and this base is embedded in the gel

pectin, another type of polysaccharide. Pectins have multiple physical walls of the

symbols, such as electric charge, density, porosity

distribution of enzymes and proteins and from cell to cell adhesion.

,

Pectins are used for commercial purposes to thicken jams and jellies. Type II

walls of cereals and other monocot relatives tether >> << microfibrils with various sugars and pectin of relatively poor. The hardness of the wood comes from

lignin, which is impregnated between the cellulose microfibrils. Lignin is a phenolic compound

, chemically related to benzene. Cell walls of fungi varied among taxonomic groups, but most contain chitin

microfibrils embedded in a matrix of polysaccharides and

covered with loose cover additional molecular combination of sugars and peptides

(amino acid chains). However, the cell walls of Oomycetes

contain fiber, but not chitin. Different groups of fungi can be distinguished in part

on the composition of their cell wall components. Cellulose is a significant part of the framework mikrofibrillyarny sama

algae, although some contain other polysaccharides, as well. These

mikrofibrillyarny network embedded in a thick gel of polysaccharides

tremendous diversity. Three important classes of algae, Chlorophyceae

(green), Rhodophyceae (red), and Phaeophyceae (brown) can be

differ to some extent depending on the components of the polysaccharides.

Alginic acid and fucans are in brown algae, while

agarose and carrageenan are predominantly in the red algae. Some order strattera of these

polysaccharides used as thickening and stabilizing agents in various food products

. .