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An enzyme carbon paste electrode for quantitation of fructose in a flow injection analysis (FIA) system is developed. The sensor is based on a commercially available pyrrolo quinoline quinone (PQQ)-fructose dehydrogenase. The enzyme is introduced into the carbon paste matrix and addition of polyethyleneimine (PEI) allows an unmediated anodic current to be achieved at 400 mV vs. Ag/AgCl after injections...
H 2 -forming N 5 ,N 10 -methylenetetrahydromethanopterin dehydrogenase catalyzes the reversible dehydrogenation of N 5 ,N 10 -methylenetetrahydromethanopterin (CH 2 = H 4 MPT) to N 5 ,N 10 -methenyltetrahydromethanopterin (CH H 4 MPT + ) and H 2 . In D 2 O both HD and D 2...
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