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Thermo Scientific™

Dynabeads™ M-280 Streptavidin, for OEM and industrial use only

Uniform and superparamagnetic Dynabeads™, 2.8 μm in diameter, with a monolayer of recombinant streptavidin covalently coupled to the surface and further blocked with BSA.
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Catalog NumberVolume (Metric)
35137100 mL
3513610 mL
Catalog number 35137
Price (MXN)
-
Volume (Metric):
100 mL

Uniform and superparamagnetic Dynabeads™, 2.8 μm in diameter, with a monolayer of recombinant streptavidin covalently coupled to the surface and further blocked with BSA. The beads allow for efficient capture and downstream handling of your biotinylated ligand or target molecule. The streptavidin monolayer ensures negligible leakage, and the lack of excess adsorbed streptavidin ensures batch consistency and reproducibility of your results.

Streptavidin-coupled Dynabeads™ is the gold standard for isolation and handling of biotinylated antibodies, nucleic acids or other biotinylated ligands and targets. The liquid-phase behavior in combination with the superparamagnetic properties of the beads provide rapid reaction kinetics both in the coating process, separation and during washing of the analyte.

The product holds reputable Dynal high standards with respect to reproducibility and automation ability, and drives reliability for your assays.

Benefits and Features:
• Direct and fast capture of any biotinylated ligand or target
• Flexible solid-phase protocols with superior liquid-phase reaction kinetics
• Easy and reproducible handling in manufacturing
• Low charged and neutral beads, optimal for binding of proteins, peptides and antibodies
• Fast and efficient washing procedures
• High batch-to-batch reproducibility, securing consistent results in your application
• Well suited for automated protocols

Applications:
Efficient capture of biotinylated molecules. For direct⁄indirect isolation and downstream handling of nucleic acids, proteins⁄peptides and other target molecules. Due to their uniformity, excellent batch reproducibility and ease of adaptation to automated processes, Dynabeads™ have become the solid phase of choice for immunoassay development.

Binding capacity:
The size of the molecule and the biotinylation procedure will affect the binding capacity. The capacity also depends on steric availability and charge interaction between bead and molecule and between molecules. There are two or three biotin binding sites available for each streptavidin molecule on the surface of the bead after immobilization. One mg of Dynabeads™ M-280 Streptavidin typically binds 650-900 pmoles free biotin, 200 pmol biotinylated peptides, up to10 μg biotinylated antibody, approx. 10 μg ds-DNA or 200 pmol ss-Oligonucleotides.

Additional Info:
This specific product format is for large volume customers, available on an OEM basis. The product is also available in smaller volumes for end-users (Cat. no 112-05D, 112-06D and 602-10).

For Research Use Only. Not for use in diagnostic procedures.
Specifications
Concentration10 mg/mL
FormatBeads in suspension
High-throughput CompatibilityHigh-throughput Compatible
Ligand TypeStreptavidin
Product LineDYNAL, Dynabeads
Quantity100 mL
Shipping ConditionRoom Temperature
Volume (Metric)100 mL
Diameter (Metric)2.8 μm
Product TypeStreptavidin Magnetic Beads
Unit SizeEach
Contents & Storage
Store at 2°C to 8°C. To extend product stability, it is recommended that the gas volume above the solution be flushed with argon or nitrogen following each use.

Frequently asked questions (FAQs)

I am getting high background using Dynabeads M-280 Streptavidin magnetic beads. How can I prevent this from happening?

The background might be caused by nonspecific binding to the BSA on the bead surface. Alternatively, high background might be caused by nonspecific binding to streptavidin. Increasing either the pH or the salt concentration might help reduce the binding. Dynabeads M-270 Streptavidin magnetic beads might be a better alternative; these beads are not coated with BSA and are hydrophilic, as they are based upon carboxylic acid chemistry.

What is the binding capacity of streptavidin-coupled Dynabeads magnetic beads?

- One milligram of Dynabeads M-280 Streptavidin magnetic beads typically binds 650-900 pmol of free biotin, 200 pmol of biotinylated peptide, up to 10 µg of biotinylated antibody, 10 µg of biotinylated double-stranded DNA, or 200 pmol of biotinylated single-stranded oligonucleotides.

- One milligram of Dynabeads M-270 Streptavidin magnetic beads typically binds more than 950 pmol of free biotin, 200 pmol of biotinylated peptide, up to 10 µg of biotinylated antibody, 10 µg of biotinylated double- stranded DNA, or 200 pmol of biotinylated single-stranded oligonucleotides.

- One milligram of Dynabeads MyOne Streptavidin C1 magnetic beads typically binds more than 2,500 pmol free biotin, 400 pmol of biotinylated peptides, up to 20 µg of biotinylated antibody, 20 µg of biotinylated double-stranded DNA, or 500 pmol of biotinylated single-stranded oligonucleotides.

-One milligram of Dynabeads MyOne Streptavidin T1 magnetic beads typically binds 1,100-1,700 pmol free biotin, 400 pmol of biotinylated peptides, up to 20 µg of biotinylated antibody, 20 µg of biotinylated double- stranded DNA, or 400 pmol of biotinylated single-stranded oligonucleotides.

Find additional tips, troubleshooting help, and resources within our Protein Assays and Analysis Support Center.

For how long can the Streptavidin-coupled Dynabeads magnetic beads be stored?

Storage should be at 2 to 8 degrees C. Freezing or drying of the Dynabeads magnetic beads is not recommended. Provided the Dynabeads magnetic beads are stored correctly, quality is guaranteed until the expiry date stated on the label.

Find additional tips, troubleshooting help, and resources within our Protein Assays and Analysis Support Center.

How may I optimize binding capacity of streptavidin-coupled Dynabeads magnetic beads?

The binding capacity of streptavidin-coupled Dynabeads magnetic beads is fragment length-dependent. Reduced binding capacity for large DNA fragments may be due to steric hindrance. For large DNA fragments (greater than 2 kb in size), we recommend using Dynabeads kilobaseBINDER Kit.

-Salt concentration affects the binding efficiency of biotinylated nucleic acids to the Streptavidin-coupled Dynabeads magnetic beads. Optimal binding conditions for biotinylated DNA fragments (up to 1 kb) are achieved at 1 M NaCl (final concentration), 25 degrees C and 15 min incubation time. Longer DNA fragments should be immobilized overnight. Biotinylated antibodies should be immobilized in PBS buffer pH 7.4, supplemented with 0.1% BSA.

-Ensure that your sample does not contain an excess of free biotin, as the free biotin will bind Streptavidin-coupled Dynabeads magnetic beads much more rapidly than larger biotinylated molecules. Biotinylated oligonucleotides should be recovered by reverse phase HPLC or FPLC to remove free biotin from the sample.

-We also recommend a titration to optimize the quantity of beads used for each individual application, since both the size of the specific molecule to be immobilized and the biotinylation procedures affect the binding capacity of the beads.

Find additional tips, troubleshooting help, and resources within our Protein Assays and Analysis Support Center.

I have used biotinylated antibodies coupled to Dynabeads Streptavidin magnetic beads for immunoprecipitation (IP). How do I elute my target protein from the antibody without eluting the antibody off the beads?

Use mild elution conditions, e.g., a buffer with high salt or low pH. Heating the beads at 95 degrees C for 5 mins in SDS sample buffer will elute the antibody as well.

Find additional tips, troubleshooting help, and resources within our Protein Assays and Analysis Support Center.