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Free energy and its affects

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What affect does the presence of metal ions like Mg++ in the cell have on free energy of hydrolysis of ATP??

raise, lower, or no affect why??

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https://brainmass.com/biology/biological-chemistry/free-energy-and-its-affects-142249

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Definitely, Mg++ will have an affect on the free energy of hydrolysis of ATP, even as pH has an effect. How come?

The effect of Mg++ ions on ATP hydrolysis is actually quite complex. If you decrease the Mg++ concentration from about 100 mM to 1 mM, we see a decrease in the free energy of hydrolysis by about 1 kcal/mol. However, here's the interesting part. If you decrease the Mg++ even further, say, ...

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Free energy and its affects of the presence of metal ions in the cell of hydrolysis of ATP.

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