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Immunoglobulins, known as "Igs," are a group of proteins that help protect your body from illness. The immunoelectrophoresis-serum test is used to measure Ig levels.
The enzyme-linked immunosorbent assay (ELISA or EIA) screens for HIV. It is similar to the Western blot test. Learn how these tests work and what the results mean.
Serum protein electrophoresis (SPEP) is a laboratory technique that's used to determine the level of some types of proteins in a blood sample. Learn more about why your doctor may recommend it.