ROLE OF GLUTEN PROTEIN IN THE FOOD PRODUCTS OF LIVING BEINGS AND ITS EFFECT ON THEIR BODY BOTH PHYSICOCHEMICAL AND METABOLICALLY REACTIONS
1
Author(s):
PRAVEEN KUMAR
Vol - 5, Issue- 3 ,
Page(s) : 69 - 87
(2014 )
DOI : https://doi.org/10.32804/CASIRJ
Abstract
Gluten proteins play a key role in determining the unique baking quality of wheat by conferring water absorption capacity, cohesivity, viscosity and elasticity on dough. Gluten proteins can be divided into two main fractions according to their solubility in aqueous alcohols: the soluble gliadins and the insoluble glutenins. Both fractions consist of numerous, partially closely related protein components characterized by high glutamine and proline contents. Gliadins are mainly monomeric proteins with molecular weights around 28,000-55,000 and can be classified according to their different primary structures into the alpha/beta-, gamma- and omega-type. Disulphide bonds are either absent or present as intrachain crosslink. The glutenin fraction comprises aggregated proteins linked by interchain disulphide bonds. After reduction of disulphide bonds, the resulting glutenin subunits show a solubility in aqueous alcohols similar to gliadins. Based on primary structure, glutenin subunits have been divided into the high-molecular-weight (HMW) subunits (MW=67,000-88,000) and low-molecular-weight (LMW) subunits (MW=32,000-35,000). Each gluten protein type consists of two or three different structural domains; one of them contains unique repetitive sequences rich in glutamine and proline.
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