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The effect of pH on enzyme activity is an important factor in determining the efficiency of enzymatic reactions because enzymes are proteins with specific three-dimensional structures that are sensitive to changes in the surrounding hydrogen ion concentration. Each enzyme has an optimum pH at which its activity is highest, and deviation from this optimum pH can lead to decreased activity or even complete denaturation. The pH affects enzyme activity primarily by altering the ionization state of amino acid residues, especially those present in the active site and those involved in maintaining the enzyme’s tertiary structure. Since the shape of the active site is crucial for substrate binding, any change in the charge distribution can disturb enzyme-substrate interaction ___ ________ ___ _________ ____ _________ __________ ______ ________ _________ ____.
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