A protein's shape and structure are in part determined by its balance of positive, negative, and neutral charges. Positively charged amino acids attract negatively charged ones. This might cause one region of a protein to "stick" to another region of the protein. If the pH varies substantially, the protein might reversibly denature, or unravel its structure. In this experiment, one will determine whether a purified solution of the protein casein will reversibly denature, and observe at which pH
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