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LC-MS/MS product ion chromatograms of tryptic digested TSST-1 peptide ions with an m/z value of 838.4 (t = 11.5 min) (A) and 830.4 (t = 15 min) (B). Untreated SEB and NVC-422-treated SEB samples are shown in red and black, respectively. Six micromolars TSST-1 (6 μM) was incubated in 0.1% (4 mM) NVC-422 in 20 mM PBS (pH 7) buffer at 37°C for 15 min.
