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MALDI-TOF mass spectrum of G. frondosa glucans using 2, 5-DHB as a matrix. The gap with 162 Da between peaks represents a hexose unit in the extract. Fragmented ions appeared at DP = 4-15 with 667.8, 830.0, 1166.0, 1814.5, 1976.6, and 2406.0 Da, respectively.
