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Serum or plasma protein electrophoresis with bromocresol purple and bromocresol green staining

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

This test measures the different types of proteins in your blood, separated by size and charge. It helps identify abnormalities in protein distribution, which may indicate conditions like multiple myeloma, liver disease, or other disorders.

Quick summary

["This test helps diagnose and monitor conditions affecting protein levels in your blood."]

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

Key facts at a glance

LOINC
55895-7
Short code
HPRT/APRT CVS-cRto
Synonyms
HPRT/APRT CVS-cRto
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 distinct bands based on their electrical charge and size. The test uses two dyes—bromocresol purple and bromocresol green—to visualize these bands, revealing patterns that can signal underlying health issues.

Why It’s Done

Your doctor may order this test if you have symptoms like unexplained weight loss, fatigue, swelling, or if tests suggest problems with protein production, liver function, or kidney disease.

Common Conditions Monitored

Abnormal protein patterns may point to conditions such as multiple myeloma (cancer of plasma cells), chronic liver disease, or certain autoimmune disorders. The test helps track disease progression or response to treatment.

Sample Collection & Preparation

A blood sample is drawn from a vein, typically in your arm. The blood is then processed to separate serum or plasma for analysis. No special preparation is needed, but fasting may be advised depending on your doctor’s instructions.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Protein Electrophoresis (BCP/BCG)

Frequently asked questions

How long will the results take to come back?
Results are usually available within 24 to 48 hours, depending on lab processing times. Your doctor will discuss the findings with you during your follow-up visit.
Can I eat or drink before this test?
No specific diet is required for this test, but always follow your doctor’s instructions. If fasting is required for another test, note it here.
What are the most common causes of abnormal results?
Abnormal results may stem from conditions like multiple myeloma, liver disease, kidney problems, or certain infections. Your doctor will interpret results in the context of your medical history and symptoms.
  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