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Enzymatic characterization of GST-ygiF PPPase activity.

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posted on 12.09.2012, 02:20 authored by Gregory Kohn, David Delvaux, Bernard Lakaye, Anne-Catherine Servais, Georges Scholer, Marianne Fillet, Benjamin Elias, Jean-Michel Derochette, Jacques Crommen, Pierre Wins, Lucien Bettendorff

(A) Enzyme activity as a function of PPPi concentration. The curve was obtained by non-linear fitting to the Michaelis-Menten equation. The Mg2+ concentration was 5 mM. (B) PPPase activity as a function of pH at 0.5 mM Mg2+. (C) PPPase activity as a function of Mg2+ concentration. (D) Inhibition of PPPase activity by Ca2+ in the presence of Mg2+ (5 mM). If not otherwise stated, the substrate concentration was 0.5 mM and the incubation was carried out at 50°C and at pH 8.5. (Means ± SD, n = 3).

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