Knowra Hemicellulose Hemicellulose Hemicellulose is a diverse group of branched polysaccharides in plant cell walls. Its polymers associate with cellulose and other wall components, helping shape wall structure and properties.
Xylose : A five-carbon monosaccharide that forms the backbone of many plant xylans. Xylose supplies the backbone sugar in the most widespread hemicellulose family.
Cellulose : A linear polymer of glucose that forms structural microfibrils in plant cell walls. Hemicellulose associates with cellulose microfibrils, connecting its diverse chains to wall structure.
Lignocellulosic biomass : Plant-derived material composed chiefly of cellulose, hemicellulose, and lignin. Hemicellulose is one of the three major structural fractions processed from this biomass.
Pectin : A family of galacturonic-acid-rich polysaccharides abundant in plant primary cell walls. Pectin is another wall polysaccharide, but its chemistry and wall interactions differ from hemicellulose.
Xylan : A polysaccharide built mainly from xylose residues, often decorated with other sugars or chemical groups. Xylans are the predominant hemicelluloses in many plant cell walls.
Plant cell wall : A composite extracellular structure surrounding plant cells, built from polysaccharides, proteins, and other substances. The wall is the larger material whose organization hemicellulose helps shape.
Biofuel : Fuel produced from biological material or its products. Sugars released from hemicellulose can be fermented into fuels.
Starch : A plant storage polysaccharide composed of glucose polymers, including amylose and amylopectin. Starch stores glucose, whereas hemicellulose primarily contributes to cell-wall structure.
Mannan : A polysaccharide whose backbone contains mannose residues, sometimes combined with glucose or galactose. Mannans exemplify hemicelluloses with a backbone distinct from xylan.
Cellulose synthase : A membrane-associated enzyme complex that synthesizes cellulose chains in plants. Cellulose deposition creates the microfibrils with which hemicellulose associates.
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