Immunophenotyping by flow cytometry provides a rapid and accurate assessment of the frequency and type of leukocytes present in a whole blood sample. Quantitation of peripheral blood leukocyte subsets has been shown to be useful in the evaluation of immunodeficiency, autoimmune, and oncologic disorders. CD-Chex Plus® is a
whole blood positive procedure control with assayed values used to monitor reagent staining, erythrocyte lysis,
sample preparation, and instrument performance. CD-Chex Plus control cells mimic whole blood samples by
possessing surface antigens detectable with fluorescent monoclonal antibodies by flow cytometry.