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Bromocresol Green Protein Electrophoresis (Serum)

Published: August 9, 2026Updated: August 16, 2026

This test measures the distribution of proteins in your blood using electrophoresis with the bromocresol green dye, which helps identify abnormalities in protein patterns.

Quick summary

["This test helps diagnose conditions affecting protein balance in your blood."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
41803-8
Short code
RF Guided Brst Bx
Synonyms
RF Guided Brst Bx
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
rf
CPT
86430
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

What This Test Measures

Electrophoresis separates blood proteins (such as albumin and globulins) based on size and charge. Bromocresol green binds to specific protein fractions, allowing for visual assessment of protein concentration gradients across gel lanes.

Why It’s Ordered

Doctors may order this test to evaluate conditions like hypoalbuminemia, dysproteinemias (e.g., multiple myeloma), or other systemic protein disorders. It can also help monitor treatment responses in patients with chronic diseases.

Common Uses and Indications

This test is less commonly used today compared to more specific protein assays but remains valuable in certain clinical scenarios, such as assessing protein electrophoresis patterns in suspected monoclonal gammopathies or evaluating liver/kidney function indirectly.

Sample Collection and Preparation

A blood sample is drawn from a vein, typically in the arm. The serum (liquid part after clotting) is separated and analyzed in a laboratory using electrophoresis with bromocresol green dye.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

BCG Protein Electrophoresis

Frequently asked questions

How long will it take to get my results?
Results are usually available within 24 to 48 hours, depending on lab processing times. Follow-up with your healthcare provider is recommended to discuss findings.
What does a low or high protein pattern mean?
Abnormal patterns may indicate conditions like liver disease (reduced albumin), infections, or abnormal protein production (e.g., monoclonal gammopathy). Your doctor will interpret results in context of your symptoms and medical history.
Can I eat or drink before this test?
No special preparation is needed, but avoid alcohol or certain medications that may affect protein levels for 24 hours before testing if advised by your provider.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy