Histidine

From Citizendium
Jump to navigation Jump to search
The printable version is no longer supported and may have rendering errors. Please update your browser bookmarks and please use the default browser print function instead.
This article is a stub and thus not approved.
Main Article
Discussion
Related Articles  [?]
Bibliography  [?]
External Links  [?]
Citable Version  [?]
 
This editable Main Article is under development and subject to a disclaimer.
(CC) Image: David E. Volk
Histidine, a common amino acid.

Histidine, abbreviated His or H, is one of the twenty common -amino acids used by living organisms to build proteins. It is one of the four aromatic amino acids along with phenylalanine, tyrosine and tryptophan. At physioligical pH, histidine is usually protonated and is found mostly on the surface of proteins.