Label-Free Proteomics Study on Celiac Disease Active Epitopes in Common Wheat, Spelt, Durum Wheat, Emmer and Einkorn

An untargeted liquid chromatography tandem mass spectrometry method was used to analyze the content of peptides with celiac disease (CD) active epitope in the five wheat species common wheat, spelt, durum wheat, emmer and einkorn. In total, 494 peptides with CD active epitope were identified. Relevant differences between the species concerning their CD immunoractive potential based on the distribution of CD-active epitopes and relative quantities of peptides with CD-active epitope were demonstrated.