1,4 glycosidic bond: Difference between revisions
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[[Image:Alpha and Beta Glycosidic Bonds.png|right|Alpha and Beta Glycosidic Bonds.png]] Glycosidic bonds are formed due to a [[Condensation reaction|condensation reaction]] between two [[Monosaccharides|monosaccharides]], to form a [[Polysaccharide|polysaccharide]] (polymers, or many units of sugars). A condensation reaction is when two molecules combine to create a simple molecule and [[Water|water]] is eliminated. The glycosidic bond can be [[Hydrolysis|hydrolysed]] by the addition of a water molecule to reform two monosaccharides ([[MONOMERS|monomers]], or single units of sugars). | [[Image:Alpha and Beta Glycosidic Bonds.png|right|Alpha and Beta Glycosidic Bonds.png]] Glycosidic bonds are formed due to a [[Condensation reaction|condensation reaction]] between two [[Monosaccharides|monosaccharides]], to form a [[Polysaccharide|polysaccharide]] (polymers, or many units of sugars). A condensation reaction is when two molecules combine to create a simple molecule and [[Water|water]] is eliminated. The glycosidic bond can be [[Hydrolysis|hydrolysed]] by the addition of a water molecule to reform two monosaccharides ([[MONOMERS|monomers]], or single units of sugars). | ||
The [[1,4 glcosidic bond|1,4 glycosidic bond is]] formed between the [[Carbon|carbon]]-1 of one monosaccharide and carbon-4 of the other. There are are two types of glycosidic bonds - 1,4 alpha and 1,4 beta glycosidic bonds. 1,4 alpha glycosidic bonds are formed when the OH on the carbon-1 is below the [[Glucose|glucose]] ring; while 1,4 beta glycosidic bonds are formed when the OH is above the plane<ref>Jeremy M. Berg, John L. Tymoczko, Lubert Stryer . Biochemistry Seventh Edition Freeman | The [[1,4 glcosidic bond|1,4 glycosidic bond is]] formed between the [[Carbon|carbon]]-1 of one monosaccharide and carbon-4 of the other. There are are two types of glycosidic bonds - 1,4 alpha and 1,4 beta glycosidic bonds. 1,4 alpha glycosidic bonds are formed when the OH on the carbon-1 is below the [[Glucose|glucose]] ring; while 1,4 beta glycosidic bonds are formed when the OH is above the plane<ref>Jeremy M. Berg, John L. Tymoczko, Lubert Stryer . Biochemistry Seventh Edition Freeman</ref>. When two alpha [[D-glucose|D-glucose]] molecules join together a more commonly occurring isomer of [[Glucose|glucose]] compared to the L-glucose, form a glycosidic linkage, the term is [[known|known]] as a α-1,4-glycosidic bond<ref>Berg JM, Tymoczko JL, Stryer L. Biochemistry. 5th edition. New York: W H Freeman; 2002. Section 11.2, Complex Carbohydrates Are Formed by Linkage of Monosaccharides. Available from: http://www.ncbi.nlm.nih.gov/books/NBK22396/</ref>.<br> | ||
=== References === | === References === | ||
<references /> | <references /> | ||
Revision as of 13:38, 19 October 2016
Glycosidic bonds are formed due to a condensation reaction between two monosaccharides, to form a polysaccharide (polymers, or many units of sugars). A condensation reaction is when two molecules combine to create a simple molecule and water is eliminated. The glycosidic bond can be hydrolysed by the addition of a water molecule to reform two monosaccharides (monomers, or single units of sugars).
The 1,4 glycosidic bond is formed between the carbon-1 of one monosaccharide and carbon-4 of the other. There are are two types of glycosidic bonds - 1,4 alpha and 1,4 beta glycosidic bonds. 1,4 alpha glycosidic bonds are formed when the OH on the carbon-1 is below the glucose ring; while 1,4 beta glycosidic bonds are formed when the OH is above the plane[1]. When two alpha D-glucose molecules join together a more commonly occurring isomer of glucose compared to the L-glucose, form a glycosidic linkage, the term is known as a α-1,4-glycosidic bond[2].
References
- ↑ Jeremy M. Berg, John L. Tymoczko, Lubert Stryer . Biochemistry Seventh Edition Freeman
- ↑ Berg JM, Tymoczko JL, Stryer L. Biochemistry. 5th edition. New York: W H Freeman; 2002. Section 11.2, Complex Carbohydrates Are Formed by Linkage of Monosaccharides. Available from: http://www.ncbi.nlm.nih.gov/books/NBK22396/