# Hordein

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> Markdown URL: https://mediated.wiki/source/Hordein.md
> Source: https://en.wikipedia.org/wiki/Hordein
> Source revision: 1337022089
> License: Creative Commons Attribution-ShareAlike 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/)

{{Refimprove|date=June 2017}}
'''Hordein''' is a [prolamin](/source/prolamin) [glycoprotein](/source/glycoprotein), present in [barley](/source/barley) and some other [cereal](/source/cereal)s, together with [gliadin](/source/gliadin) and other glycoproteins (such as [glutelins](/source/glutenin)) coming under the general name of [gluten](/source/gluten). Hordeins are found in the [endosperm](/source/endosperm) where one of their functions is to act as a [storage](/source/storage_protein) unit.<ref name=":0">{{Cite book|last=Boulton|first=Chris|title=Encyclopedia of Brewing|publisher=John Wiley & Sons, Incorporated|year=2013|isbn=9781118598122|pages=322–323|language=English}}</ref> 

Hordeins are less soluble when compared to proteins such as [albumin](/source/albumin)s and [globulin](/source/globulin)s.<ref name=":0" />

Hordeins have a substantial amount of the amino acids [proline](/source/proline) and [glutamine](/source/glutamine) but lack charged amino acids such as [lysine](/source/lysine).<ref name=":0" />

Some people are sensitive to hordein due to disorders such as [celiac disease](/source/celiac_disease) or [gluten intolerance](/source/gluten_intolerance). 

Along with gliadin (the prolamin gluten found in wheat), hordein is present in many foods and also may be found in beer. Hordein is usually the main problem for coeliacs wishing to drink beer.

Coeliacs are able to find specialist breads that are low in hordein, gliadin and other problematic glycoproteins, just as they can find [gluten free beer](/source/gluten_free_beer) which either uses ingredients that do not contain gluten, or otherwise has the amounts of gliadin or hordein present controlled to stated limits.

== References ==
{{reflist}}

Category:Gluten
Category:Seed storage proteins
Category:Glycoproteins

[de:Gliadin](/source/de%3AGliadin)

{{Protein-stub}}

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Adapted from the Wikipedia article [Hordein](https://en.wikipedia.org/wiki/Hordein) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Hordein?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.