Bromocresol Purple Protein Electrophoresis (Serum/Plasma)
This test measures protein distribution in your blood using a technique called electrophoresis with the dye bromocresol purple. It helps identify patterns of protein separation that may indicate conditions affecting protein levels or composition.
["This test helps diagnose or monitor conditions related to abnormal protein levels in your blood."]
Key facts at a glance
- LOINC
- 14811-4
- Short code
- WBC # Pcar Manual
- Synonyms
- WBC # Pcar Manual
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Ref low
- 4.5
- Ref high
- 11
- Critical range
- 2 N/A – 30 N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- manual-count
- CPT
- 85004
- SNOMED
- 900000000000003002
- 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 size and charge. Bromocresol purple binds to proteins, allowing for visual differentiation of fractions such as albumin, alpha-globulins, beta-globulins, and immunoglobulins. This process helps detect shifts in protein distribution that could signal underlying health issues.
Common Uses
This test is often used to evaluate conditions like multiple myeloma, amyloidosis, chronic liver disease, or other disorders that alter protein synthesis or breakdown. It may also assist in monitoring treatment progress for these conditions.
How the Test Works
A small blood sample is drawn and placed in a gel or medium. An electric current is applied, causing proteins to migrate toward the opposite charge. The bromocresol purple dye stains the proteins, creating visible bands that represent different protein groups.
Sample Collection
Your blood will be drawn from a vein, typically in your arm. This is a standard venipuncture procedure. You may feel a slight pinch, but the process is quick and usually not painful.
Reference range
Adult: 4.5-11.0 x 10^9/LN/A
No special preparation required. Stay well hydrated.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
◆Associated findings1
Short name
BCP Protein Electrophoresis
Frequently asked questions
Why might I need this test?
What does the test result mean?
How long will it take to get results?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
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.
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