FIG. 4.
Chromatographic separation of the culture supernatant of L. sanfranciscensis LTH2590 grown to stationary phase in Su-MRS (90 g liter−1) by using a polyspher CH PB column coupled to a refractive index detector (A) and anion-exchange chromatography coupled to an electrochemical detector (B). The peak identification was based on external standards; shown in the figure are chromatograms of the 1-kestose external standards. In panel A, the chromatogram of the culture supernatant is additionally compared to that of the same culture supernatant upon acid hydrolysis. Chromatograms are offset by 250 mV.