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Bromocresol Purple Protein Electrophoresis (Serum/Plasma)

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

This test measures protein distribution across different fractions in your blood, often used to assess conditions affecting protein balance.

Quick summary

["Helps diagnose and monitor protein disorders in your bloodstream."]

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

Key facts at a glance

LOINC
49885-7
Short code
LPT Be Pnl Bld
Synonyms
LPT Be Pnl Bld
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Ref low
0.8
Ref high
1.2
Critical range
— – 5 N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
CPT
85610
SNOMED
396252006
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 Is Protein Electrophoresis Used For?

Protein electrophoresis separates blood proteins into bands based on size and charge. This helps identify abnormal protein patterns, such as those seen in multiple myeloma, amyloidosis, or other protein-related disorders. It can also detect low levels of albumin or globulins, which may indicate kidney disease or liver problems.

How Is the Test Performed?

A small blood sample is drawn from your arm, placed in a gel, and subjected to an electric current. Proteins migrate toward the opposite charge, creating distinct bands that are analyzed for their composition.

Common Conditions Monitored

This test is often used to screen for conditions like multiple myeloma (cancer of plasma cells), Waldenström macroglobulinemia, or hereditary conditions affecting protein structure. It may also help evaluate kidney function or liver disease by assessing albumin and globulin levels.

Preparation and Timing

No special preparation is needed, but fasting is not required. Results may take several days to analyze, depending on lab workload.

Reference range

INR: 0.8-1.2 (warfarin: 2.0-3.0)N/A

Specimen: serum

Inform your healthcare provider if you are taking blood thinners. No special preparation required.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

BCP Protein Electrophoresis

Frequently asked questions

Why might my doctor order this test?
Your doctor may recommend this test if they suspect a condition affecting blood proteins, such as a plasma cell disorder, kidney disease, or liver issues. It can also be part of a routine evaluation for hereditary protein disorders.
What do the results mean?
Results show distinct bands representing different protein types. Abnormal patterns (e.g., extra bands, missing bands, or skewed distribution) may signal a problem that needs further medical evaluation. Your healthcare provider will interpret results in the context of your symptoms and medical history.
How often should I get this test?
Frequency depends on your health condition. If you have a known protein disorder, your doctor may schedule follow-up tests regularly. If it’s a screening test, it may be done less often, such as every few years or as needed for monitoring.
  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