Bromocresol Purple Protein Electrophoresis (Serum/Plasma)

What This Test Measures

The BCP protein electrophoresis separates proteins in your serum or plasma into distinct bands. Each band represents a group of proteins with similar electrical charges. The test detects the relative amounts of these protein groups, including albumin, alpha-globulins, beta-globulins, and gamma-globulins. Abnormal patterns may indicate conditions affecting protein production or breakdown.

How the Test Works

A small sample of your blood is drawn and mixed with a special solution containing bromocresol purple dye. When an electric current is applied, proteins move toward the positive end of the gel based on their charge. The dye binds to different proteins, creating visible bands that show their concentration levels.

Why It’s Done

Doctors may order this test to investigate symptoms like unexplained weight loss, fatigue, swelling, or signs of organ dysfunction. It’s also used to monitor conditions like multiple myeloma, liver disease, or kidney disease, where protein patterns in the blood can provide clues about disease progression or treatment effectiveness.

Common Conditions Evaluated

Abnormal results may suggest conditions such as multiple myeloma (a cancer of plasma cells), liver cirrhosis, nephrotic syndrome (kidney disease causing protein loss), or inflammatory disorders. Low albumin levels might indicate malnutrition or liver/kidney problems, while high gamma-globulin levels could signal chronic infections or autoimmune diseases.