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Flow cytometry facilitates quantitative, multiparameter analysis of cell populations based on the expression of cell surface and/or intracellular molecules. R&D Systems offers a wide range of biotin-, fluorescein-, phycoerythrin-, PerCP-, AlexaFluor® 488-, or allophycocyanin-conjugated monoclonal antibodies specifically designed to monitor protein expression by flow cytometry. Also available are Fluorokine® kits; labeled cytokines that can be used to monitor the presence of cytokine receptors.

• Cell Surface Staining Antibodies for Flow Cytometry
  A rapid and simple method to immunophenotype cell populations.
• Fluorokine Receptor Detection Kits
  Biotinylated ligands for estimating receptor densities.
• Intracellular Staining Antibodies for Flow Cytometry
  Intracellular staining reagents offer a rapid and simple method to identify cells that secrete selected cytokines (e.g. Th1 vs. Th2). A variety of fluorochrome-labeled isotype controls, conjugated with the same fluorochrome to protein ratio, are available to aid in assessing background staining.
• Multi-Color Flow Cytometry Kits
  Kits to simultaneously label cells with up to four antibodies conjugated to four different fluorochromes.
• Flow Cytometry Supplemental Reagents
  Antibody isotype controls and supplemental staining reagents for flow cytometry.

AlexaFluor is a registered trademark of Life Technologies.