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Tetraspanin Exo-Flow Capture Kit

For the selective capture and FACS of exosome subpopulations based on the presence of three general exosome markers, the tetraspanins CD9, CD63, and CD81

  • A range of well-validated antibodies for reliable and reproducible purification
  • Large-sized magnetic beads increase the efficiency of exosome capture
  • Reversible Exo-FITC and Exo-APC stains can be completely removed after FACS
  • Exosome Elution Buffer simultaneously removes Exo-FITC (or Exo-APC) and elutes exosomes from the magnetic beads for downstream applications such as functional studies
Catalog Number
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Tetraspanin Exo-Flow Combo capture kit (Magnetic streptavidin beads, CD9, CD63, and CD81-biotin capture antibodies, Wash and Elution Buffers, Exo-FITC stain)
10 Reactions
$ 729


Go with the flow for easy exosome isolation using FACS

The Tetraspanin Exo-Flow Capture Kit has all the reagents you need to purify exosomes using FACS—magnetic streptavidin beads, CD9-, CD63- and CD81-biotin capture antibodies, wash and elution buffers, and reversible Exo-FITC stain (Cat.# EXOFLOW800A-1)—you supply the FACS and the optional magnetic stand (Cat.# EXOFLOW700A-1). Our well-validated tetraspanin-biotin antibodies—CD9, CD63, and CD81—and high-quality kit components ensure reliable, reproducible exosome purification based on the presence of three general exosome markers (CD9, CD63, and CD81). And with our larger-than-typical bead size (9.1 μm diameter) exosome capture is highly efficient, assisting with recovery of rare exosome populations.

Note that we also offer reversible Exo-APC (Cat.# Exo-FLOW810A-1) as an alternative stain to Exo-FITC.

  • A range of well-validated antibodies for reliable and reproducible purification
  • Large-sized magnetic beads increase the efficiency of exosome capture
  • Reversible Exo-FITC and Exo-APC stains can be completely removed after FACS
  • Exosome Elution Buffer simultaneously removes Exo-FITC (or Exo-APC) and elutes exosomes from the magnetic beads for downstream applications such as functional studies

More than just Tetraspanins

To facilitate the widest range of studies, SBI built the Exo-Flow system to be highly modular. We offer a range of biotinylated antibodies as well as a Basic Exo-Flow Kit (Cat.# CSFLOWBASICA-1) with no antibody so that you can use your own biotinylated antibodies.

Cat.# Kit
EXOFLOW100A-1 CD9 Exo-Flow Capture Kit
EXOFLOW150A-1 Tetraspanin Exo-Flow Combo Capture Kit

EXOFLOW200A-1 CD31 Exo-Flow Capture Kit
EXOFLOW210A-1 CD44 Exo-Flow Capture Kit
EXOFLOW300A-1 CD63 Exo-Flow Capture Kit
EXOFLOW400A-1 CD81 Exo-Flow Capture Kit
EXOFLOW500A-1 Rab5b Exo-Flow Capture Kit
EXOFLOW600A-1 HLA-G Exo-Flow Capture Kit
EXOFLOW610A-1 CD14 Exo-Flow Capture Kit
EXOFLOW620A-1 CD68 Exo-Flow Capture Kit
EXOFLOW630A-1 EpCAM Exo-Flow Capture Kit
EXOFLOW660A-1 CD73 Exo-Flow Capture Kit

How It Works

Easily purify exosomes using FACS with the Tetraspanin Exo-Flow Capture Kit

At a glance
Simply (1) couple the tetraspanin-biotin antibodies to the magnetic streptavidin beads, (2) use the tetraspanin-coupled magnetic beads to capture exosomes that have been isolated using either ExoQuick® or ultracentrifugation, (3) wash away unbound exosomes, and then (4) stain with reversible Exo-FITC (excitation and emission wavelengths of 494 nm and 518 nm, respectively).

Your sample is now ready for FACS analysis.

To use the purified exosomes after FACS, add the included Exosome Elution Buffer to simultaneously remove the Exo-FITC stain and elute intact exosomes from the beads.

Supporting Data

See the Exo-FLOW Capture Kit data for CD9, CD63, and CD81 markers

The Tetraspanin Exo-Flow Capture Kit delivers quantitative, highly selective exosome isolation. Bead flow separation data for exosomes secreted by HEK293 cells and captured using either the CD9 (top row), CD63 (middle row), or CD81 (bottom row) Exo-Flow Capture Kits. Plots of forward scatter versus FITC intensity show that in the no exosome control, only 0.5% of particles are FITC-positive (left panels), whereas in the exosome-containing sample, 99.3% of particles are FITC-positive (middle panels). The highly linear binding capacity of the Exo-Flow beads is shown (right panel, CD9), with the degree of flow separation shown in the inset graph for CD9, and in the right panels for CD63 and CD81.
Human serum exosomes were isolated from 250 µL serum using ExoQuick® and the exosome pellet resuspended in 500 µL of 1x PBS. Exosome particles were added as two-fold dilutions starting at 50 µL, and then captured using the biotinylated antibody coupled to Exo-Flow beads. The FITC flow cytometric intensities are then plotted versus the number of exosome particles (determined using NanoSight).


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