CD-Chex Select®

CD-Chex Select is a positive procedural control that includes CD26, CD41, CD57, CD58, CD61, CD64, CD79a, FMC7, MPO, TCR α/β and TCR γ/δ. It is an assayed, whole blood control that features a cap pierceable vial for use with automated flow cytometry sample preparation instruments.

CD-Chex Select immunophenotyping quality control for flow cytometry

Designed to mimic a patient sample, CD-Chex Select contains human leukocytes and erythrocytes in a preservative medium. The cells in CD-Chex Select possess surface and intracellular antigens detectable with fluorescent monoclonal antibodies by flow cytometry. It is a positive procedural flow cytometry control assayed for 11 CD markers used for immunophenotyping: CD26, CD41, CD57, CD58, CD61, CD64, FMC7, TCR α/β, TCR γ/δ, and intracellular CD79a and MPO. CD-Chex Select is designed to represent normal peripheral blood leukocytes where lymphocytes, monocytes, and granulocytes are distinguishable on the basis of light scatter properties.

Show More
CD-Chex Select immunophenotyping quality control for flow cytometry

For Research Use Only. Not for use in diagnostic procedures.


  • Assayed for 11 CD markers, including 2 intracellular markers
  • Cap pierceable vials for use with automated sample preparation instruments
  • Whole blood control mimics patient sample
  • Compatible with BD Biosciences and Beckman Coulter flow cytometry systems
  • 30-day open-vial stability
  • 90-day closed-vial stability


Product Information

Quality Pillars for Building Measurement Assurance in Flow Cytometry Webinar

Quality Pillars for Building Measurement Assurance in Flow Cytometry

The webinar provides updates on the current best quality practices in flow cytometry and case studies for assay, reagent and instrument monitoring.

Watch the webinar

DescriptionCatalog Number
2 x 3.0 mL (Sample 1, Sample 2) 213554
4 x 3.0 mL (Sample 1, Sample 2) 213555

View the lot release schedule

Order CD-Chex Select today

International customers find a distributor

Based on Streck’s proprietary cell-stabilization technology, we offer a comprehensive line of positive procedural controls and cellular stabilization products for immunophenotyping by flow cytometry. Our unique quality controls provide assay values for both normal and abnormal leukocyte populations and reference values for both intracellular and surface markers. Our cellular stabilization products are designed to preserve samples for extended periods while easing handling concerns and allowing for room temperature storage, cold-chain free shipping and batch processing.

Flow Cytometry Quality Control and Stabilization products

The latest from the blog

Quality Control

Male infertility causes and testing

Many couples face issues with fertility, or the ability to have children. If a pregnancy is not achieved after 12 months of having unprotected sex, th…
Read More
Quality Control

Understanding diabetes A1c tests

According to the World Health Organization (WHO), the number of people worldwide with diabetes rose from 108 million in 1980 (4.7% of the adult popula…
Read More
Sickle cell
Quality Control

Benefits of sickle testing in athletes

Sickle cell trait (SCT) runs under the radar most of the time, yet it can be deadly serious. People who experience physically strenuous situations, su…
Read More