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Serum or Plasma Protein Electrophoresis with Bromocresol Green (BCG) Dye Binding Assay

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

This test measures the distribution of different protein types in your blood, often used to check for conditions affecting protein levels or patterns, such as kidney disease or certain cancers.

Quick summary

["This test helps identify abnormal protein patterns that may signal underlying health issues."]

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

Key facts at a glance

LOINC
105553-2
Short code
U1 snRNP Ab Ser-aCnc
Synonyms
U1 snRNP Ab Ser-aCnc
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
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

Protein electrophoresis separates blood proteins into fractions (e.g., albumin, globulins) based on size and charge. The BCG dye binding assay quantifies protein concentrations in each fraction, providing a detailed profile of your blood’s protein composition.

Why It’s Done

Your doctor may order this test to diagnose or monitor conditions like multiple myeloma, kidney disease, liver disease, or other disorders that alter protein levels or patterns in your blood.

Sample Collection and Preparation

A blood sample is drawn from a vein, typically in the arm. The blood is processed to separate serum or plasma, which is then analyzed using electrophoresis and the BCG dye binding method to measure protein fractions.

Common Conditions Monitored

This test helps detect abnormalities such as monoclonal gammopathy (e.g., in multiple myeloma), hypoalbuminemia, or dysproteinemias (unusual protein patterns). It may also assess kidney or liver function indirectly.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Protein Electrophoresis (BCG)

Frequently asked questions

Why might my results be different from what I expected?
Results may vary based on factors like hydration status, recent protein intake, or underlying health conditions. Always discuss any deviations with your healthcare provider, as patterns can indicate specific medical concerns.
How long will it take to get my results?
Results are typically available within 24 to 48 hours, depending on lab processing times and your healthcare provider’s workflow. Follow-up may be needed if abnormal findings are detected.
Can I eat or drink anything before this test?
No special diet or fasting is required for this test. However, inform your doctor about any medications or supplements you’re taking, as they may affect 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