#immunoassay__immunochemical_assay  identification of a substance (especially a protein) by its action as an antigen; "PSA in the blood can be measured with an immunochemical assay"
  supertype:  bioassay  appraisal of the biological activity of a substance by testing its effect on an organism and comparing the result with some agreed standard
  subtype:  radioimmunoassay  immunoassay of a substance that has been radioactively labeled

No statement uses or specializes immunoassay; click here to add one.