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Line Blot Analysis for Protein P155 (Serum)

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

This test detects specific proteins in your blood using a line blot assay. It helps identify abnormal protein patterns that may relate to genetic conditions or metabolic disorders.

Quick summary

["This test may be used to screen for rare genetic or metabolic disorders affecting protein function."]

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

Key facts at a glance

LOINC
81738-7
Short code
RNAp III RP155 Ab Ser Ql Line blot
Synonyms
RNAp III RP155 Ab Ser Ql Line blot
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
line-blot
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

Why This Test Might Be Ordered

Your healthcare provider may recommend this test if you have symptoms like unexplained muscle weakness, developmental delays, or a family history of genetic disorders. It could also be part of a broader evaluation for conditions affecting protein metabolism.

What to Expect Before the Test

No special preparation is needed. You’ll provide a blood sample, typically drawn from your arm. The test involves a simple blood draw, similar to other routine blood tests.

What the Test Results Mean

Results show whether specific proteins are present or absent in your blood. Abnormal patterns may indicate genetic mutations or metabolic issues. Your provider will interpret results in the context of your symptoms and medical history.

Common Conditions Monitored

This test is often used to diagnose or monitor conditions like certain lysosomal storage disorders, metabolic errors, or inherited protein-related diseases.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance: Understanding the Role of Protein P155

Short name

P155 Protein Line Blot

Frequently asked questions

How long will I have to wait for my results?
Results are typically available within 1–3 business days, depending on lab processing times. Your healthcare provider will contact you directly with the outcome.
Can I eat or drink before this test?
No dietary restrictions apply. You can eat and drink normally before your blood draw, as this test only requires a simple blood sample.
Is this test painful?
The blood draw may cause mild discomfort for a few seconds, similar to other routine tests. Most people experience minimal pain, and the area may feel sore briefly afterward.
  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