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Serum or Plasma Protein Electrophoresis (Qualitative) with Bromocresol Green Staining

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

This test measures the distribution of different protein types in your blood, often used to identify unusual patterns that may suggest conditions like multiple myeloma, liver disease, or other protein disorders.

Quick summary

["Helps diagnose and monitor protein-related health conditions by analyzing blood protein composition."]

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

Key facts at a glance

LOINC
98003-7
Short code
HLA Class I Ab.IgG Don Spec SerPl
Synonyms
HLA Class I Ab.IgG Don Spec SerPl
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
CPT
82784
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 based on their size and electrical charge. Bromocresol Green dye binds to specific proteins, allowing for visual differentiation of albumin, alpha-globulins, beta-globulins, and gamma-globulins. This qualitative method helps detect abnormal protein bands or shifts that may indicate underlying health issues.

Why It’s Done

Your healthcare provider may order this test to investigate symptoms like unexplained weight loss, fatigue, swelling, or abnormal lab results. It’s also used to monitor conditions such as multiple myeloma, liver disease, or certain autoimmune disorders where protein patterns can change over time.

Sample Collection and Preparation

A blood sample is drawn from a vein, typically in your arm. The sample is then processed to separate serum or plasma, which is sent to the lab for electrophoresis. The results are visually interpreted to assess protein distribution.

Common Conditions Evaluated

This test helps identify conditions where protein patterns deviate from normal, such as: - Multiple myeloma (cancer of plasma cells) - Liver or kidney disease (affecting protein synthesis or clearance) - Certain autoimmune diseases (e.g., rheumatoid arthritis) - Inflammatory conditions (e.g., infections or chronic illnesses).

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Protein Electrophoresis (BCG)

Frequently asked questions

How long does it take to get results from this test?
Results are typically available within 24 to 48 hours, depending on lab processing times. Your healthcare provider will discuss the findings with you during your follow-up visit.
Can I eat or drink anything before this test?
No special preparation is needed for this test. However, if you have a history of bleeding disorders or take blood thinners, inform your provider before the draw.
What if my results show abnormal protein patterns?
Abnormal results may prompt further testing, such as additional protein electrophoresis methods (e.g., quantitative or high-resolution), imaging studies, or consultations with specialists like hematologists or nephrologists to determine the cause and guide treatment.
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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