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By Harold McGee
Published 2004
Proteins are long, chain-like molecules built up from smaller molecules called amino acids. Most of the gluten proteins, the gliadins and the glutenins, are around a thousand amino acids long. The gliadin chains fold onto themselves in a compact mass, and bond only weakly with each other and with the glutenin proteins. The glutenins, however, bond with each other in several ways to form an extensive, tightly knit network.