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Serum Protein Electrophoresis (Qualitative) with Bromocresol Purple Staining

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

This test measures the distribution of different protein types in your blood serum using electrophoresis, a technique that separates proteins based on size and charge. The bromocresol purple stain helps identify specific protein bands.

Quick summary

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

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

Key facts at a glance

LOINC
51439-8
Short code
M Protein 3 24h Ur Elph-mCnc
Synonyms
M Protein 3 24h Ur Elph-mCnc
Category
chemistry
Sample
urine
Container
Sterile urine container
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
electrophoresis
Specimen volume
10 mL
Stability
Room temperature: 2h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
0
Lipemia max
0
Icterus max
0
TAT
4–24 hours
Order
routine

What This Test Measures

Electrophoresis separates proteins into distinct bands based on their electrical charge and size. The bromocresol purple stain highlights certain proteins, allowing healthcare providers to assess their relative amounts. This qualitative test does not provide exact quantities but helps detect shifts in protein composition.

Why It’s Done

Your doctor may order this test to investigate symptoms like unexplained swelling, fatigue, or signs of organ dysfunction. It’s also used in screening for conditions such as multiple myeloma, amyloidosis, or chronic kidney disease.

Preparation

No special preparation is needed, but fasting may not be required. You’ll provide a blood sample drawn from a vein, typically in your arm.

Common Conditions Evaluated

This test helps diagnose or monitor conditions where protein patterns differ from normal, such as: - **Kidney disease** (e.g., nephrotic syndrome), - **Liver disease** (e.g., cirrhosis), - **Multiple myeloma** (a cancer of plasma cells), - **Amyloidosis** (abnormal protein deposits in tissues).

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Protein Electrophoresis (Qualitative)

Frequently asked questions

How long will it take to get my results?
Results are usually available within 24 to 48 hours, depending on your lab. Your healthcare provider will discuss them with you during a follow-up visit.
Can I eat or drink before this test?
No special diet is required. You can eat and drink normally unless instructed otherwise by your doctor.
What if I have a bleeding disorder or take blood thinners?
If you have a bleeding disorder or take medications that thin your blood, your doctor may advise additional precautions, such as avoiding certain activities or medications, to prevent excessive bleeding during the blood draw.
  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