How many serum proteins are typically observed in electrophoresis?

• A. 3
• B. 5
• C. 7
• D. 4

Answer: (B)

In serum protein electrophoresis, five major protein fractions are typically observed. These fractions are albumin, alpha-1 globulins, alpha-2 globulins, beta globulins, and gamma globulins. Each of these fractions represents different proteins present in the serum, which play various roles in the body including transport, immune response, and maintaining oncotic pressure.

Albumin is the most abundant serum protein and is responsible for maintaining osmotic pressure and transporting various substances. The globulin fractions include proteins that are crucial for immune function (such as antibodies in the gamma globulin fraction) and transport functions (in the alpha and beta globulin fractions).

The understanding of these five fractions is vital in clinical settings for diagnosing and monitoring a range of diseases, including liver disease, kidney disease, and certain types of infections and inflammatory conditions. Assessing the levels and proportions of these proteins can provide valuable insights into the patient’s health status.