Printer Friendly
Dictionary, Encyclopedia and Thesaurus - The Free Dictionary
3,587,833,716 visitors served.
forum Join the Word of the Day Mailing List For webmasters
?
Dictionary/
thesaurus
Medical
dictionary
Legal
dictionary
Financial
dictionary
Acronyms
 
Idioms
Encyclopedia
Wikipedia
encyclopedia
?

isoprenoid

   Also found in: Dictionary/thesaurus, Medical, Wikipedia, Hutchinson 0.01 sec.

isoprenoid

 or terpene

Class of organic compounds made up of two or more structural units derived from isoprene. Isoprene is a five-carbon hydrocarbon with a branched-chain structure, two double bonds (see bonding), and the molecular formula C5H8. In isoprenoids, isoprene units (with one or neither of their double bonds) are linked into larger molecules having from two to thousands of five-carbon units that can take the form of both linear structures and rings. Many of these molecules play a wide variety of roles in plant and animal physiological processes and as intermediates in the biological synthesis of other important molecules. They contribute greatly to the flavours and fragrances of essential oils and other plant-derived substances. Geraniol (a contributor to rose perfumes; from geranium oil), menthol (from peppermint oil), citral (from lemongrass oil), limonene (from lemon and orange oils), pinene (from turpentine), and camphor each have two isoprene units. Examples with more units include phytol, a precursor of chlorophyll; squalene, the precursor of cholesterol and other steroids; lycopene, the red pigment in tomatoes and an important phytochemical; and carotene, the pigment in carrots and a precursor of vitamin A. Natural rubber and the related gutta-percha are polyisoprenes comprising many thousands of isoprene units.


isoprenoid [‚ī·sə·′prē‚nȯid]
(organic chemistry)


How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content.
?Page tools
Printer friendly
Cite / link
Feedback
Mentioned in?  References in periodicals archive?   Encyclopedia browser?   Full browser?
No references found
 
6) The researchers found that tocotrienol, an isoprenoid molecule, inhibits the liver enzyme responsible for cholesterol production in the body (HMG CoA reductase enzyme or HMGR).
Squalene synthase inhibitors held the theoretical promise of having fewer side-effects than statins, as they do not deplete the mevalonate pool and so should not interfere with isoprenoid synthesis.
The experiments indicate that increased effective stress resulted in decreases in heavy n-alkanes and isoprenoids, and increases in aromatic and saturated ring concentrations.
 
 
 
Encyclopedia
?

Terms of Use | Privacy policy | Feedback | Copyright © 2012 Farlex, Inc.
Disclaimer
All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only. This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional.