Bromocresol Purple Protein Electrophoresis (Serum/Plasma)
This test measures the distribution of different protein fractions in your blood, helping identify abnormalities in protein patterns that may signal conditions like multiple myeloma, amyloidosis, or other disorders affecting protein synthesis or breakdown.
["Protein electrophoresis helps diagnose blood protein disorders by showing how proteins separate in an electric field."]
Key facts at a glance
- LOINC
- 30403-0
- Short code
- WBC # Pcar
- Synonyms
- WBC # Pcar
- 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
- 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
The test uses bromocresol purple dye to separate proteins in your blood into bands based on size and charge. This creates a profile of protein types, including albumin, globulins, and other fractions, which can reveal imbalances or unusual patterns.
Why It’s Done
Healthcare providers may order this test if you have symptoms like unexplained weight loss, fatigue, swelling, or a history of conditions like multiple myeloma, lymphoma, or kidney disease. It helps assess protein-related disorders that affect how your body produces or uses proteins.
Sample Collection
A blood sample is drawn from a vein, usually in your arm. The blood is processed to separate serum or plasma for testing. This is a simple procedure with minimal discomfort.
Preparation
No special preparation is needed, but fasting may be advised depending on your specific test instructions. Inform your provider about any medications or supplements you take, as they may affect results.
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.
Abnormal protein patterns can indicate conditions like monoclonal gammopathy (an excess of a single protein), systemic amyloidosis (protein buildup in organs), or chronic inflammatory diseases. Low albumin levels may signal malnutrition or liver/kidney issues, while high or unusual globulin bands could point to immune system disorders or infections.
Short name
BCP Protein Electrophoresis
Frequently asked questions
How long does it take to get results?
What does a normal result mean?
Can I eat or drink before this test?
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