
Prolamines are a group of plant storage proteins having a high proline content and found in the seeds of cereal grains: wheat (gliadin), barley (hordein), rye (secalin), corn (zein), sorghum (kafirin) and as a minor protein, avenin in oats. They are characterised by a high glutamine and proline content and are generally soluble only in strong alco...
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http://en.wikipedia.org/wiki/Prolamin

any of certain seed proteins known as globulins that are insoluble in water but soluble in water-ethanol mixtures. Prolamins contain large amounts ... [1 related articles]
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http://www.britannica.com/eb/a-z/p/120

<protein> A simple protein found in plants which cannot be dissolved in anything except strong alcohol solutions.It is an important component of gluten. ... (09 Oct 1997) ...
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http://www.encyclo.co.uk/local/20973

any of the class of simple proteins, as gliadin, hordein, or zein, found in grains, soluble in dilute acids, alkalis, and alcohols, and insoluble in water, neutral salt solutions, and absolute alcohol.
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https://www.infoplease.com/dictionary/prolamin
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