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Continuous-flow synthesis of alpha-gliadin peptides in an ultrasonic field and assay of their inhibition of intestinal sucrase activity.

Three dodecapeptide amides derived from the amino acid sequence of alpha-gliadin and four of their analogues were synthesized by continuous-flow solid-phase multiple peptide synthesis. Ultrasonic field conditions accelerated the coupling reaction without affecting purity. Biological tests of the synthetic fragments showed the relevance of toxicity prediction for preselection of immunogenic alpha-gliadin fragments.