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. 2015 Jul 16;290(36):22203–22211. doi: 10.1074/jbc.M115.659656

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© 2015 by The American Society for Biochemistry and Molecular Biology, Inc.

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FIGURE 6. — Energy diagram for Cel7A hydrolysis of a glycosidic bond in insoluble cellulose. The abscissa is the reaction path as discussed in the main text and illustrated by the schematics and equations below the figure. The ordinate shows changes in free energy (G; black curve), enthalpy (H; red curve), and entropy (−TS; green curve) along the reaction path. Note that the entropic contribution is given as its negative value, −TΔS. The diagram defines a total of five changes (three activated complexes and two equilibria), and the thermodynamic functions pertaining to each of these steps are specified by a set of super- and subscript. For the G function, these five steps are identified by the dashed lines in the figure, and the super- and subscripts are given in the associated symbols. The same set of super- and subscripts are used for the H and −TS functions in the text.