CD-Chex TdT Plus® by Streck

Manufacturer Streck  |  Available Worldwide
CD-Chex TdT Plus is a positive procedural control that provides reference values for TdT, CD1a, CD2, CD4, CD5, CD7, CD8, CD34 and cytoplasmic CD3. This control contains several markers designated as “rare flow antigens” by CAP.  

CD-Chex TdT Plus<sup>®</sup> by Streck product image
CD-Chex TdT Plus®
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CD-Chex TdT Plus is a ready-to-use control for evaluating CD2, CD4, CD5, CD7, CD8, CD34, cytoplasmic CD3 and nuclear TdT expression by flow cytometry. This control contains an abnormally high CD34+ population and is designed to monitor reagent staining, erythrocyte lysis, sample preparation and instrument performance. 

CD-Chex TdT Plus provides reference values for abnormal peripheral blood leukocytes often found in certain types of hematopoietic neoplasms and is compatible with BD® Biosciences and Beckman Coulter® flow cytometry systems. 


  • Only flow cytometry control assayed for TdT, CD1a, CD34 and cytoplasmic CD3 
  • Offers an abnormally high level of CD34: over 60% positive for CD34+  
  • Compatible with BD Biosciences and Beckman Coulter flow cytometry systems 
  • 30-day open-vial stability; 90-day closed-vial stability 


  • Manufacturer established assay ranges – no need to verify range per CAP requirements 
  • Reduces the need for labs to hold and validate patient samples for use as a control 
  • Access to STATS®, Streck’s free interlaboratory quality control program for peer group data comparison 
  • For Research Use Only. Not for use in diagnostic procedures.