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Bromocresol Green Protein Binding Capacity (BCG Protein Binding Capacity)

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

This test measures how well certain proteins in your blood can bind to a dye called bromocresol green, which helps assess liver function and protein synthesis.

Quick summary

["This test helps evaluate liver health and protein production in your bloodstream."]

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

Key facts at a glance

LOINC
43447-2
Short code
Deprecated MG Brst-R Bx needle guide
Synonyms
Deprecated MG Brst-R Bx needle guide
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
mg
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

Why This Test Is Done

Your healthcare provider may order this test if they suspect liver disease, such as cirrhosis or hepatitis, or if you have symptoms like fatigue, jaundice (yellowing of skin/eyes), or unexplained weight loss. It can also be used to monitor liver function during treatment for conditions like liver failure or after liver transplants.

How the Test Works

A small blood sample is taken from a vein, usually in your arm. The sample is then processed to measure how bromocresol green binds to proteins in your blood. This binding capacity reflects the overall protein and liver function status.

Sample Collection and Preparation

The blood sample is collected in a sterile tube and sent to a lab for analysis. The test does not require fasting, but timing may vary depending on clinical needs.

What to Expect Before the Test

There are no special preparations needed for this test. You may have some mild discomfort or bruising at the injection site, but this usually goes away quickly.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

BCG Protein Binding Capacity

Frequently asked questions

What does a low bromocresol green protein binding capacity mean?
A low result may suggest liver disease, such as cirrhosis or chronic hepatitis, which can impair protein production. It can also indicate other conditions affecting protein synthesis or liver function.
How long does it take to get results from this test?
Results are typically available within 1 to 3 business days, depending on your lab’s processing schedule. Your healthcare provider will discuss the results with you during your follow-up visit.
Can I eat or drink before this test?
No special diet is required for this test. You can eat and drink normally before your blood draw, as it does not affect the test results.
  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