Magnetic silica beads coated with streptavidin efficiently bind to biotinylated molecules, such as peptides, proteins, antibodies, sugars, and lectins. These beads are suitable for many applications based on the strong Streptavidin-Biotin interaction. They are particularly useful as a solid support phase in immunoassays.
These beads come in three different diameters: 600nm, 1µm and 3µm. Beads of 600nm have a larger surface area, and the sedimentation time of 600nm beads is approximately 4 times slower than that of 1µm beads. This allows longer incubation times without shaking/mixing. Magnetic silica beads with a diameter of 3µm have stronger magnetic properties and will separate approximately 4 times faster than 600nm beads under the same conditions.
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