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Five hundred-megahertz 1-dimensional 1H NMR analysis of maltoheptaose (DP7) incubated with 90 nM GTFB for 7 days in 50 mM sodium acetate buffer, pH 4.7, containing 1 mM CaCl2. (A) Incubation sample; (B) ethanol-precipitated fraction (P2) from the incubation sample. Red., reducing glucose unit.
