Prolamins are a group of plant storage proteins having a high proline amino acid content. They are found in plants, mainly in the seeds of cereal grains such as wheat (gliadin), barley (hordein), rye (secalin), corn (zein), sorghum (kafirin), and oats (avenin).

prolamin, any of certain seed proteins known as globulins that are insoluble in water but soluble in water-ethanol mixtures. Prolamins contain large amounts of the amino acids proline and glutamine (from which the name prolamin is derived) but …

Prolamins are plant-derived proteins that can be soluble in alcohol. Depending on their source, prolamins can be categorized as zein, gliadin, kafirin, hordein, secalin, and avenin.

Prolamins are alcohol-soluble proteins which usually contain proline and amide nitrogen but are deficient in lysine such as zein of corn, hordein of barley, gliadin of wheat, and kafirin of kafir corn. You might find these chapters and articles relevant to this topic.

Prolamins are a group of proteins that are defined by their solubility in alcohol/water mixtures. Wheat contains two types of prolamins: the monomeric gliadin proteins and the polymeric glutenin proteins.

Colot V., Bartels D., Thompson R., Flavell R. Molecular characterization of an active wheat LMW glutenin gene and its relation to other wheat and barley prolamin genes. Mol Gen Genet. 1989 Mar;216 (1):81–90. doi: 10.1007/BF00332234. [DOI] [PubMed] [Google Scholar]

Prolamin storage proteins are the main repository for nitrogen in the endosperm of cereal seeds. These stable proteins accumulate at massive levels due to the high level expression from extensively duplicated genes in endoreduplicated cells.

The prolamins belong to a superfamily of seed proteins, including α -amylase and trypsin inhibitors, as well as 2S albumins; all apparently evolved from a common ancestral gene. A major step in the evolution of many of the prolamin genes was the generation of domains encoding repeated amino acid sequences, rich in glutamine and proline.