Inhibition of T cell proliferation by the blocking compounds 4, 5, 6, and 7. The T cell clone 437.1.3.17 (specific for the DQ2-γII gliadin epitope) was stimulated with 2.5 μM GIIQPEQPAQL (P1298, DQ2-γII gliadin epitope) in the presence of increasing concentration of peptide blockers (■) P198, (●) peptide 4, (□) peptide 5, (△) peptide 6, (▽) peptide 7. P198: KPLLIIAEDVEGEY; Mycobacterium bovis 65 kDa heat shock protein 243-255Y. Mean and range is shown.