Exosome-Streptavidin Isolation/Detection Reagent
Exosome-Streptavidin Isolation/Detection Reagent
Invitrogen™

Exosome-Streptavidin Isolation/Detection Reagent

Exosome-Streptavidin Isolation/Detection Reagent, when combined with your choice of biotinylated primary antibody, enables the purification of exosomes (also called extracellularRead more
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Catalog number 10608D
Price (USD)
442.00
Each
Add to cart
Price (USD)
442.00
Each
Add to cart
Exosome-Streptavidin Isolation/Detection Reagent, when combined with your choice of biotinylated primary antibody, enables the purification of exosomes (also called extracellular vesicles and multi-vesicular bodies) from pre-enriched samples. These exosomes can then be detected using techniques such as flow cytometry, electron microscopy, or Western blotting. The exosomes must be pre-enriched before isolation. This can be done by ultracentrifugation, or by using the fast and efficient Total Exosome Isolation (from cell culture media) reagent.

• Maximum flexibility with your choice of biotinylated antibody
• 'See' your sample during handling
• Easily scalable protocol
• Detect exosomes via flow cytometry, in less than 1 hour

Isolation and detection of exosomes has been a tedious, non-specific, and difficult process. Exosome - Streptavidin for Isolation/Detection utilizes the well-known Dynabeads™ magnetic separation technology. When combined with the biotinylated antibody of your choice, this technology allows you to easily purify pre-enriched exosomes from cell culture media and then move on to detect the purified exosomes via techniques such as flow cytometry, electron microscopy, or Western blotting.

Detect by Flow Cytometry
Because free exosomes alone are too small to be detected by flow cytometry, one of the major advantages of employing magnetic separation technology is that the purified, bead-bound exosomes can be easily visualized by flow cytometry. The monodispersed and relatively large Dynabeads™ (4.5 μm in diameter) allow for a clear and defined FFC/SSC, typically in less than 1 hour.

'See' Your Sample
Not only are the superparamagnetic Dynabeads™ known for their sensitivity, reproducibility, and stability, but the magnetic handling also allows you to 'see' your sample due to the light brown color of the beads. When the sample tube is placed on the magnet, the bead-bound exosomes are pulled to the side of the tube, allowing for easy separation and purification. In addition, the sample and bead volume can be easily scaled up or down according to your sample size or downstream applications.

Good Mixing is Critical
For successful exosome isolation it is important to use a mixer that tilts and rotates to ensure that the beads do not settle in the tube. Avoid end-over end rotation for small sample volumes (e.g., 100 μl). Please see user manual below for more guidelines.
For Research Use Only. Not for use in diagnostic procedures.
Specifications
Cell TypeCells in culture
Product TypeIsolation/Detection Reagent
Product LineDynabeads™
Quantity3 mL
Sample TypeCell Culture Supernatants
Target SpeciesHuman
Diameter (Metric)4.5 μm
Unit SizeEach
Contents & Storage
Store at 2°C to 8°C.

Frequently asked questions (FAQs)

Can Dynabeads Streptavidin magnetic beads be boiled?

We do not recommend this as streptavidin becomes hydrophobic and aggregates during denaturation.

My Dynabeads magnetic beads are not pelleting well with the magnet. Do you have any suggestions for me?

Please review the following possibilities for why your Dynabeads magnetic beads are not pelleting:

- The solution is too viscous.
- The beads have formed aggregates because of protein-protein interaction.

Try these suggestions: - Increase separation time (leave tub on magnet for 2-5 minutes)
- Add DNase I to the lysate (~0.01 mg/mL)
- Increase the Tween 20 concentration to ~0.05% of the binding and/or washing buffer.
- Add up to 20 mM beta-merecaptoethanol to the binding and/or wash buffers.

Find additional tips, troubleshooting help, and resources within our Dynabeads Nucleic Acid Purification Support Center.

Which streptavidin-conjugated Dynabeads magnetic beads are the right beads for my application?

Which product to choose depends on the properties of your sample, the buffers and solutions applied, as well as the downstream application. In general, all Dynabeads Streptavidin beads can be used in applications involving biotinylated ligands; however, some beads may perform better than others in particular applications due to their characteristics. Dynabeads M-280 Streptavidin beads and Dynabeads MyOne Streptavidin T1 beads are commonly used for protein and nucleic acid applications. Dynabeads M-270 Streptavidin beads and MyOne Streptavidin C1 beads are preferred for nucleic acid diagnostics, specifically with samples that have a high concentration of chaotropic salts, immunoassays involving small biotinylated antigens, and in applications that are not compatible with BSA, as these beads are not blocked with BSA. Dynabeads MyOne Streptavidin beads offer increased binding capacity and slower sedimentation rate, making them ideal for automated applications and when larger amounts of a biotinylated compound or its specific target need to be isolated. Please see the selection guide here ( https://www.thermofisher.com/us/en/home/brands/product-brand/dynal/streptavidin-coupled-dynabeads.html?icid=fr-strep-1).

How do I measure the binding of biotinylated nucleic acid on streptavidin beads?

You can assay the supernatant for unbound nucleic acid to determine the amount of nucleic acid bound to the Dynabeads Streptavidin beads. The concentration of nucleic acids can be checked by measuring the OD or by running them on a gel. Alternatively, the nucleic acids can be labeled radioactively and the concentration measured directly on the beads, or fluorescently and measured in the supernatant.

Can Dynabeads Streptavidin beads be used directly in PCR or real-time PCR reactions?

Our Dynabeads Streptavidin magnetic beads can be used directly in PCR or real-time PCR. However, you would have to empirically optimize the amount of beads to be used per volume of reaction.