prolamine
Definition
Noun: A simple, alcohol-soluble protein found in the seeds of cereal grains. Prolamines are a type of plant storage protein and are notable for being rich in the amino acid proline and glutamine, but deficient in essential amino acids like lysine. They are a major component of the protein fraction in grains such as wheat (gliadin), barley (hordein), rye (secalin), and corn (zein).
Usage Examples
- The prolamine content in wheat, known as gliadin, is responsible for the elastic properties of dough.
- Researchers are studying the digestibility of different prolamines in animal feed.
- Some individuals have an immune reaction to specific prolamines, such as those found in wheat and rye.
Advanced Usage
- In nutritional science, the term prolamine is often discussed in the context of protein quality due to its imbalance of essential amino acids.
- In food chemistry, the functional properties of a prolamine, like zein from corn, are exploited for making edible films and coatings.
Variants and Related Words
- Prolamin (noun): An alternative spelling for prolamine.
- Gliadin (noun): The specific prolamine found in wheat.
- Zein (noun): The specific prolamine found in corn (maize).
- Hordein (noun): The specific prolamine found in barley.
- Secalin (noun): The specific prolamine found in rye.
Synonyms
- Storage protein (in the specific context of cereal grains)
- Alcohol-soluble protein
Related Phrases & Contexts
- Prolamine fraction: Refers to the portion of total grain protein that is composed of prolamines.
- Prolamine body: A term used in cell biology for the protein storage bodies within seeds that contain prolamines.
Noun
-
a simple protein found in plants
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