In which direction do serum proteins migrate during electrophoresis?

In which direction do serum proteins migrate during electrophoresis?

• A. Anode (+) to cathode (-)
• B. Cathode (-) to anode (+)
• C. Neither, they remain stationary
• D. Randomly in all directions

Answer: (A)

In electrophoresis, serum proteins migrate toward the anode, which is positively charged, due to their overall negative charge at physiological pH levels. This migration occurs because the electric field created during electrophoresis causes molecules with a net negative charge, like the majority of serum proteins, to move towards the positively charged electrode.

This characteristic behavior of serum proteins is fundamental in clinical chemistry, where electrophoresis is commonly used to separate different types of proteins for various diagnostic purposes, such as identifying abnormalities in protein levels related to diseases. Understanding this movement helps in interpreting the results of electrophoresis, including the identification of specific protein patterns indicative of certain conditions.