Which complex carbohydrate contains only a 1 4 glycosidic linkages

From The School of Biomedical Sciences Wiki

Índice Show

References
What contains only a 1/4 glycosidic bonds?
Where are B 1 4 glycosidic linkages found?
Which type of starch consists of only 1/4 glycosidic bonds?
Does cellulose have a 1/4 glycosidic bonds?

1,4 glycosidic bond bonds are formed due to condensation reactions between a hydroxyl oxygen atom on carbon-4 on one sugar and the α-anomeric form of C-1 on the other[1].

The two monosaccharides (monomers, a molecule that can be bonded to other identical molecules to form a polymer) form a disaccharide (2 monomers bound together) and subsequently a polysaccharide (polymers, or many units of sugars). A condensation reaction is when water is eliminated to form a simple molecule. Later hydrolysis by water molecules will reform the two original monosaccharides.

The 1,4 glycosidic bond is formed between the carbon-1 of one monosaccharide and carbon-4 of the other monosaccharide. 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[2]. 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[3].

References

↑ Biochemistry. 5th edition.erg JM, Tymoczko JL, Stryer L. New York: W H Freeman; 2002 - Section 11.2Complex Carbohydrates Are Formed by Linkage of Monosaccharides https://www.ncbi.nlm.nih.gov/books/NBK22396/
↑ 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/

What contains only a 1/4 glycosidic bonds?

Amylose is an unbranched version of starch that only contains alpha-1,4-glycosidic bonds.

Where are B 1 4 glycosidic linkages found?

The β-1,4-glycosidic bond has the hydroxyl group pointing up. 1,4-glycosidic bonds can be found in both amylase and amylopectin in starch. These linkages create branching in the polysaccharide. There are many glycosidic linkages in polysaccharides due to the large number of hydroxyl groups present.

Which type of starch consists of only 1/4 glycosidic bonds?

Amylose has structural characteristics similar to cellulose because both are linear polymers of glucose, but cellulose has β-(1–4) glycosidic bonds, whereas amylose has α-(1–4) bonds.

Does cellulose have a 1/4 glycosidic bonds?

Cellulose is made up of glucose monomers that are linked by β-1-4 glycosidic bonds. These chains cluster together to form parallel bundles that are held together by hydrogen bonds between hydroxyl groups. This gives cellulose its rigidity and high tensile strength.