Which in-depth property can be utilized to separate different forms of carbonic anhydrase?

• A. Shape of the protein
• B. Hydrophobicity
• C. Net charge
• D. Size of the enzyme

Answer: (C)

The net charge of carbonic anhydrase can be used effectively to separate different forms of this enzyme through techniques like ion exchange chromatography. Each form of carbonic anhydrase may have a distinct isoelectric point, which is the pH at which the protein carries no net charge. By adjusting the pH of the surrounding environment, one can exploit the differences in the net charge of these enzyme forms to facilitate their separation. As the pH changes, the proteins will either bind to the ion exchange medium or elute from it based on their charge, allowing for the isolation of specific types of carbonic anhydrase based on their unique net charge properties. This makes charge a critical and in-depth property for separating different forms of the enzyme.

In contrast, while factors like shape, hydrophobicity, and size may also play roles in protein interaction and behavior, they do not provide the same specific and reliable method for distinguishing between different forms of carbonic anhydrase as net charge does.