What is the purpose of isoelectric focusing in protein electrophoresis?

Get ready for the CAMLPR Hematology Test. Use our quizzes, flashcards, and detailed explanations to enhance your understanding. Prepare confidently for your exam!

Multiple Choice

What is the purpose of isoelectric focusing in protein electrophoresis?

Isoelectric focusing separates proteins based on their isoelectric point (pI) using a stable pH gradient. Each protein has a specific pI, the pH at which its net charge is zero. As the electric field drives proteins through the gradient, they migrate until they reach the region where the pH equals their pI. At that point they have no net charge and stop moving, concentrating at that position. This gives high-resolution separation by pI, rather than by size or other properties. The statement that migration is governed by the protein’s isoelectric point captures this core purpose.

Isoelectric focusing separates proteins based on their isoelectric point (pI) using a stable pH gradient. Each protein has a specific pI, the pH at which its net charge is zero. As the electric field drives proteins through the gradient, they migrate until they reach the region where the pH equals their pI. At that point they have no net charge and stop moving, concentrating at that position. This gives high-resolution separation by pI, rather than by size or other properties. The statement that migration is governed by the protein’s isoelectric point captures this core purpose.

More practice questions