Monosaccharide composition analysis
Methods were adapted from previous publicationsEach sample was subjected to acid hydrolysis (4 M trifluoroacetic acid for 1 h at 121 °C) followed by addition of 855 µl of ice-cold Nanopure water. Hydrolysed samples, plus an external calibration standard comprising 14 monosaccharides with known concentrations (0.001–100 µg ml