Phosphatidylserine IgA Antibody Unit

**Semantic type:** Quantitative Concept

**Definition:** A unit for semiquantitative measurement of IgA autoantibodies to proteins associated with phosphatidylserine evaluated against an established reference standard.

**Synonyms:** - APS U - APS U - IgA Antiphosphatidylserine Unit - Immunoglobin A Phosphatidylserine Units - Immunoglobin A Phosphatidylserine Units - {APS U} - {APS U} - {APS'U}