Quinone

From Biocrawler, the free encyclopedia.

Quinone is generally defined as an aromatic benzene molecule containing a double ketone functional group. Quinone is a common constituent of biologically relevant molecules (e.g. Vitamin K1 is phylloquinone) and serve as electron acceptors in electron transport chains such as those in Photosystems I & II of photosynthesis, and aerobic respiration.

Benzoquinone refers to either of two cyclic isomers with the chemical formula C₆H₄O₂: orthobenzoquinone and parabenzoquinone.

The word quinone can also be used for a family of molecules having a cycle with two double bonds similar to benzoquinone.

Wikipedia (http://en.wikipedia.org/wiki/Main_Page) Quinone (http://en.wikipedia.org/wiki/Quinone) version history (http://en.wikipedia.org/w/index.php?title=Quinone&action=history) GNU Free Documentation Lizenz (http://en.wikipedia.org/wiki/Wikipedia:Text_of_the_GNU_Free_Documentation_License) CC-by-sa (http://creativecommons.org/licenses/by-sa/2.5/)

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