Adult: 75–160 U/mL; SI units: 75–160 kU/L
. Red-top tube.
■ Proteins involved in immunological and inflammatory
responses.
■ Diagnose angioedema; assess treatment/status of various
diseases including systemic lupus erythematosus nephritis
and other types of nephritis.
■ Deficiency associated with increased susceptibility to
infection.
