Disaccharides: Difference between revisions

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 A disaccharide is a carohydrate formed by the joining of two monosacharrides in a [[condensation reaction.]]
A Diasaccharide, is a [[Carbohydrate|carbohydrate]] molecule, which consists of two units of [[Monosaccharide|monosaccharide]] molecules bound together by a [[Glycosidic bond|glycosidic bond]].<br>


Some common examples of disaccharides are:


*[[Sucrose]] (made up of the monosaccarides [[Glucose|glucose]]&nbsp;and [[Fructose|fructose]])


The combinations of common disaccharides are:
*[[Lactose]] (made up of the monosaccarides [[Galactose|galactose]] and [[Glucose|glucose]])
*[[Maltose]] (made up of 2 glucose monosaccarides)


In lactose and maltose, an alpha [[1,4 glycosidic bond|1,4-glycosidic bond]] is formed between the two monosaccharides, resulting from the linkage of the alpha-anomeric form of C-1 on one sugar and the [[Hydroxyl|hydroxyl]] oxygen on the C-4 of the other sugar<ref>Berg J., Tymoczko J and Stryer L. (2012) Biochemistry, 7th edition, New York: W.H. Freeman. pg 337</ref>.<br>


=== References  ===


{| width="200" border="1" cellpadding="1" cellspacing="1"
<references /><br>
|-
| Maltose
| Glucose + Glucose
|-
| Lactose
| Glucose + Galactose
|-
| Sucrose
| Glucose + Fructose
|}

Latest revision as of 11:30, 5 December 2017

A Diasaccharide, is a carbohydrate molecule, which consists of two units of monosaccharide molecules bound together by a glycosidic bond.

Some common examples of disaccharides are:

In lactose and maltose, an alpha 1,4-glycosidic bond is formed between the two monosaccharides, resulting from the linkage of the alpha-anomeric form of C-1 on one sugar and the hydroxyl oxygen on the C-4 of the other sugar[1].

References

  1. Berg J., Tymoczko J and Stryer L. (2012) Biochemistry, 7th edition, New York: W.H. Freeman. pg 337