Comparison of the antigenic index of the fragments generated from the recombinant M antigen.

AUC means the integral of the area and the sum of residues score.aAbsolute values corresponding to the sum of each residue in the sequence.bIntegral of the curve representing the antigenic index and calculated area.cAverage of the antigenic index values calculated by dividing the total antigenic index by the number of residues of the considered fragment.