Disaccharide: Difference between revisions
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A disaccharide is a [[Carbohydrate|carbohydrate]] [[Polymer|polymer]] composed of two sugar [[Monomers|monomers]] (monosaccharides) which are joined by a [[Glycosidic bond|glycosidic bond]] formed by a [[Condensation reaction|condensation reaction]]. Disaccharides are the simplest forms of polysaccharides. | A disaccharide is a [[Carbohydrate|carbohydrate]] [[Polymer|polymer]] composed of two sugar [[Monomers|monomers]] ([[Monosaccharides|monosaccharides]]) which are joined by a [[Glycosidic bond|glycosidic bond]] formed by a [[Condensation reaction|condensation reaction]]. Disaccharides are the simplest forms of polysaccharides. | ||
Examples of disaccharides: | Examples of disaccharides: | ||
Maltose: two monomers of alpha-[[Glucose|glucose]] joined by an alpha 1,4 [[Glycosidic bond|glycosidic bond]]. | Maltose: two monomers of alpha-[[Glucose|glucose]] joined by an alpha 1,4 [[Glycosidic bond|glycosidic bond]]. | ||
Lactose: one galactose monomer and one glucose molecule joined by a beta 1,4 glycosidic bond. Lactose is the major sugar in milk. | Lactose: one galactose monomer and one glucose molecule joined by a beta 1,4 glycosidic bond. Lactose is the major sugar in milk. | ||
Sucrose: one glucose monomer and one fructose monomer joined by an alpha 1,2 glycosidic bond. Sucrose is a product of photosynthesis in plants. | Sucrose: one glucose monomer and one fructose monomer joined by an alpha 1,2 glycosidic bond. Sucrose is a product of photosynthesis in plants. | ||
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References: | |||
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Molecular Cell Biology 2013 (Seventh Edition) Lodish et al page 39 | Molecular Cell Biology 2013 (Seventh Edition) Lodish et al page 39 | ||
Revision as of 12:47, 30 November 2018
A disaccharide is a carbohydrate polymer composed of two sugar monomers (monosaccharides) which are joined by a glycosidic bond formed by a condensation reaction. Disaccharides are the simplest forms of polysaccharides.
Examples of disaccharides:
Maltose: two monomers of alpha-glucose joined by an alpha 1,4 glycosidic bond.
Lactose: one galactose monomer and one glucose molecule joined by a beta 1,4 glycosidic bond. Lactose is the major sugar in milk.
Sucrose: one glucose monomer and one fructose monomer joined by an alpha 1,2 glycosidic bond. Sucrose is a product of photosynthesis in plants.
References:
Molecular Cell Biology 2013 (Seventh Edition) Lodish et al page 39