Epimer: Difference between revisions
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When two isomers differ at one chiral centre. For example, when two monosaccharide carbohydrates have a different conformation of the H and OH on one of their asymmetric carbons (other than carbon 5) they are epimers. The sugars D- β-Glucose and D- β-Mannose are epimers at carbon 2 (they have different conformations at carbon 2) but the rest of their carbons are in the same conformation | When two isomers differ at one [[chiral centre|chiral centre]]. For example, when two [[monosaccharide|monosaccharide]] [[carbohydrate|carbohydrates]] have a different conformation of the H and OH on one of their asymmetric [[carbon|carbons]] (other than carbon 5) they are epimers. The sugars D- β-[[Glucose|Glucose]] and D- β-[[Mannose|Mannose]] are epimers at carbon 2 (they have different conformations at carbon 2) but the rest of their carbons are in the same conformation <ref>Stryer. L, Tymoczko. J, Berg. J. (2012) Biochemistry, 7th Edition, W.H. Freeman and Company, USA, p.331</ref>. | ||
<ref>Stryer. L, Tymoczko. J, Berg. J. (2012) Biochemistry, 7th Edition, W.H. Freeman and Company, USA, p.331</ref> | |||
=== References === | |||
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Revision as of 19:51, 29 November 2012
When two isomers differ at one chiral centre. For example, when two monosaccharide carbohydrates have a different conformation of the H and OH on one of their asymmetric carbons (other than carbon 5) they are epimers. The sugars D- β-Glucose and D- β-Mannose are epimers at carbon 2 (they have different conformations at carbon 2) but the rest of their carbons are in the same conformation [1].
References
- ↑ Stryer. L, Tymoczko. J, Berg. J. (2012) Biochemistry, 7th Edition, W.H. Freeman and Company, USA, p.331