LC/MS/MS data for Pg fragments bound by anti-Pg-RIBS mAbs. (A) The tandem mass spectrum obtained from the [M+2H+]²⁺ ion from the peptide YDYCDILECEECMHCSGENYDGK, which bound to mAb 51-Sepharose produced characteristic sequence ions which were used for its positive identification. (B) The tandem mass spectrum obtained from the [M+2H+]²⁺ ion from the peptide LSSPAVITDK, which bound to mAb 109-Sepharose, produced characteristic sequence ions which were used for its positive identification. (C) The tandem mass spectrum obtained from the [M+2H+]²⁺ ion from the peptide HSIFTPETNPR, which bound to mAb 109-Sepharose, produced characteristic sequence ions which were used for its positive identification. (D) The tandem mass spectrum obtained from the [M+2H+]²⁺ ion from the peptide QLGAGSIEECAAKCEEDEEFTCR, which bound to MAb 116-Sepharose. (E) The tandem mass spectrum obtained from the [M+2H+]²⁺ ion from the peptide, VILGAHQEVNLEPHVQEIEVSR, which bound to mAb 116-Sepharose.