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SDS-PAGE and silver staining of near stationary spent culture supernatants of Lp900. Results for desalted spent culture supernatants of Lp900 grown on glucose (lane B) or inulin (lane C) and Spectra multicolor high-range protein ladder (lane A) are shown. The arrow indicates a protein band that is uniquely present in spent culture supernatant of Lp900 grown on inulin and not in glucose with an estimated molecular weight of 140 kDa.
