Test guide
Protein Electrophoresis by Immunofixation Blood Test
An immunofixation (IFE) blood test measures the number and type of proteins in your blood. Proteins have many important functions, including giving your body energy, rebuilding muscles, and helping your immune system. There are different types of proteins, and each one has a different job for your body. This test checks to see if your body is making or losing too much of certain proteins. Your body might make too much or too little protein if you have certain health conditions.
What it is for
This test is most often used to help check for or monitor many different conditions that affect the amount of protein in the body. Some of these health conditions might be hard to find without having an immunofixation blood test. These conditions include: Source: MedlinePlus, National Library of Medicine. Medical test information is public domain. Source identity and definition checked automatically on 2026-10-18. No individual clinical interpretation or human reviewer is asserted.
Limitations
Reference intervals and interpretation depend on the laboratory, specimen, method and clinical context. This source definition is educational information; it does not establish a diagnosis, product approval or suitability for an individual.
Also known as
- serum protein electrophoresis (SPEP), protein electrophoresis, SPE, immunofixation electrophoresis, IFE, serum immunofixation
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