Fig. 4

MALDI-TOF mass spectra of tamarind seed xyloglucan (TXG), after incubation with a 1.25 µM NcLPMO9C and b 1.25 µM NcLPMO9M, both in the presence of 1 mM of ascorbic acid (Asc). TXG oligosaccharide clusters included non-oxidized oligosaccharides (H_nP_m) and C4-oxidized oligosaccharides (Ox-H_nP_m). The clusters of H₄P₃ and H₅P₃ are enlarged in the inserts. Abbreviations: H, hexaose (glucose or galactose, 162 Da); P, pentaose (xylose, 132 Da); n, number of hexaoses; m, number of pentaoses; Ox, oxidized. M/z shown correspond to lithium (Li)-adducts