Serum or Plasma Substance Concentration (Bromocresol Green Dye Binding) for Assessing Protein Electrophoresis Profile

What This Test Measures

Bromocresol green (BCG) binds to specific proteins in your blood, including albumin and globulins. The dye’s binding capacity reflects the relative concentration of these proteins, which can be analyzed to create an electrophoretic profile. This profile can show how proteins separate based on size and charge under electric fields, useful for detecting abnormalities.

How the Test Works

A small blood sample is drawn and mixed with bromocresol green dye. The mixture is then separated using electrophoresis, a technique that sorts proteins by size and charge. The dye’s binding to proteins is measured to create a profile that doctors interpret to assess protein distribution.

Common Uses

This test is often used in conjunction with other protein electrophoresis tests to diagnose conditions such as multiple myeloma, amyloidosis, or other protein-related disorders. It may also help monitor kidney function or identify abnormal protein patterns in chronic diseases.

When You Might Need This Test

Your healthcare provider may recommend this test if you have symptoms like unexplained weight loss, fatigue, swelling, or if you have a known risk for protein disorders. It’s sometimes used as part of a broader evaluation for kidney disease or chronic conditions affecting protein metabolism.