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Protein and Antibody Profile by Immunoassay (Serum/Plasma)

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

This test measures various proteins and antibodies in your blood to help identify health conditions, such as infections, autoimmune diseases, or protein disorders.

Quick summary

["Assists doctors in diagnosing and monitoring conditions by detecting abnormal protein or antibody levels."]

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

Key facts at a glance

LOINC
35639-4
Short code
C pn+psitt DNA Tiss Ql NAA+probe
Synonyms
C pn+psitt DNA Tiss Ql NAA+probe
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
probe-amp-tar
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 Proteins and Antibodies Are Tested?

This test typically includes measurements for key proteins like albumin, globulins, and specific antibodies (e.g., rheumatoid factor, antinuclear antibodies). Some tests may also check for markers of inflammation or immune response.

Why Might You Need This Test?

Your doctor may order this test if you have symptoms like fatigue, unexplained weight changes, swelling, or if they suspect conditions like kidney disease, liver disease, infections, or autoimmune disorders.

How Is the Test Performed?

A blood sample is drawn from a vein, usually in your arm. The blood is then processed to separate serum or plasma for testing using immunoassay methods.

What Are Common Conditions Monitored?

This test helps monitor conditions like chronic kidney disease, liver disease, infections (e.g., HIV, hepatitis), autoimmune diseases (e.g., lupus, rheumatoid arthritis), and certain genetic protein disorders.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical significance: Elevated or low levels of specific proteins or antibodies can indicate underlying health issues. For example, low albumin may signal liver or kidney problems, while abnormal antibody levels could point to autoimmune diseases or infections. Results help guide treatment plans and ongoing management of chronic conditions.

Short name

Protein & Antibody Screening

Frequently asked questions

What does a normal vs. abnormal result mean?
A normal result means your protein and antibody levels are within expected ranges for your age and health. An abnormal result may require further testing or evaluation by your doctor to determine the cause.
How long does it take to get results?
Results are typically available within 1 to 3 business days, depending on your lab’s processing time and any follow-up testing needed.
Can I eat or drink before this test?
For most protein/antibody tests, you can eat and drink normally. However, follow any specific instructions your doctor or lab provides, as some tests may have fasting requirements or restrictions.
  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