Table II. Relative binding affinity of AhpC peptides to HLA-DR and -DQ molecules.

Results are derived from the relative binding ratio obtained by dividing the IC₅₀ of each peptide by that of a reference peptide that binds strongly to the HLA molecule tested. Black-shaded squares indicate high-affinity binding. Diagonally hatched squares indicate moderate binding affinity. Unshaded squares indicate that no binding was detectable. Each peptide–MHC combination was evaluated in two independent experiments. Numerical values for these binding assays are given in Supplemental Table I.

ND, not done.