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Bromocresol Green Protein Electrophoresis (BCG Protein Electrophoresis)

Published: August 9, 2026Updated: August 17, 2026

This test measures protein levels in your blood using a technique called electrophoresis with bromocresol green dye to separate and analyze different protein fractions.

Quick summary

["This test helps identify abnormal protein patterns that may signal conditions like liver disease, kidney problems, or other metabolic disorders."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 17, 2026Editorial policy

Key facts at a glance

LOINC
26460-6
Short code
nRBC # Fld
Synonyms
nRBC # Fld
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Ref low
4.2
Ref high
5.9
Critical range
2 N/A – 7 N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
CPT
85041
SNOMED
900000000000003001
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 Is This Test Measuring?

Electrophoresis separates proteins in your blood based on their size and electrical charge. Bromocresol green dye binds to specific protein groups, allowing for precise measurement of protein concentrations in different fractions, such as albumin and globulins.

Why Might You Need This Test?

Doctors may order this test to diagnose or monitor conditions affecting protein balance, such as liver disease (e.g., cirrhosis), kidney disease, or certain genetic disorders. It can also help evaluate nutritional status or detect abnormal protein production.

How Is the Sample Collected?

A blood sample is drawn from a vein, usually in your arm. The sample is processed to separate proteins, and the dye binds to specific protein fractions for analysis.

What Are Common Uses?

This test is often used as part of a broader evaluation for conditions like hypoalbuminemia (low albumin), hyperglobulinemia (high globulin), or to monitor protein metabolism in chronic diseases.

Reference range

Adult males: 4.2-5.9; Females: 3.8-5.1 x 10^12/LN/A

Specimen: serum

No special preparation required. Stay well hydrated.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

BCG Protein Electrophoresis

Frequently asked questions

What does a high or low result mean?
Results alone don’t diagnose a condition—they’re part of a larger picture. High or low protein fractions may prompt further testing or discussions with your doctor about potential causes, such as diet, disease, or genetic factors.
How long does it take to get results?
Results are typically available within 1–3 business days, depending on lab processing times. Your doctor will discuss findings with you during your follow-up visit.
Is this test painful?
The blood draw itself may cause mild discomfort, but most people tolerate it well. You can expect a small bruise or soreness at the site, which usually fades quickly.
  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 17, 2026. · Read our editorial policy